Pieces We Use
Every Build A Bug kit is built from a family of brick pieces that repeat across the collection. This page lists the pieces used across all 20 kits, the colors each piece appears in, and the catalog number for each piece where one exists.
A few pieces are unique to these kits and were never sold as catalog parts. Those are listed by description only, with no number, so nothing on this page is a guess.
Missing a piece from a kit you bought? Reach out and ask. Pieces can be sourced from Bugs4Fun if your build requires certain pieces.
Plates
Plate 1 x 1 — Part 3024
Colors: Black (Element 302426) · Yellow (302424) · Light Bluish Gray (4211399) · Lime (4621557) · Green, from the Grasshopper (302428 if standard Green, 6055169 if Earth Green)
Plate 1 x 2 — Part 3023
Colors: Black (302326) · Dark Red (4539097) · Red (302321) · Tan (4113917) · Yellow (302324) · Green (302328) · Orange (4177932) · Reddish Brown (4211150) · Blue, from the Rhino Beetle (4179825 if Medium Blue, 6362254 if Bright Light Blue)
Plate 1 x 3 — Part 3623
Colors: Black (362326)
Plate 2 x 2 — Part 3022
Colors: Tan (4114084) · Black (302226) · Green (302228) · Orange (4159007) · Reddish Brown (4216695) · Dark Brown (6494115)
Plate 2 x 3 — Part 3021
Colors: Dark Red (6264030) · Lime (6013530) · Blue, from the Rhino Beetle (6411808 if Medium Blue, 6361991 if Bright Light Blue)
Plate 2 x 2 Corner — Part 2420
Colors: Green, from the Grasshopper (4157120 if standard Green, 6541446 if Earth Green)
Plate 1 x 2 Rounded with 2 Open Studs — Part 35480
Colors: Dark Green (6210271) · Black (6210270) · Tan (6212758) · Bright Pink · Yellow · Dark Red · Reddish Brown
Plate, Round 1 x 1 — Part 4073 (current mold 6141)
Colors: Reddish Brown · Green · Tan
Plate, Round 2 x 2 with Axle Hole — Part 4032
Colors: Trans Black · Light Bluish Gray · Dark Red · Reddish Brown · Pink
Tile, Round 2 x 2 with Open Stud — Part 18674
Colors: Dark Red, the Ant center stud disc
Tile, Round 2 x 2 — Part 14769
Colors: Dark Red, the Ant recessed disc
Plates with Clips, Bars and Holders
Plate 1 x 2 with Bar Handle on Side, Free Ends — Part 2540
Colors: Black (4140588) · Tan (4140593) · Yellow (4140587) · Green (4542391) · Dark Green (4249145) · Dark Red (6214312) · Red (4140585)
Note: this piece also appears in Bright Pink and in light blue in these kits, and no genuine catalog version exists in those two colors.
Plate 1 x 2 with Bar Handle on Side, Closed Ends — Part 48336
Colors: Black (4225201) · Tan (4217562)
Note: one Scorpion piece is either this part or Part 2540 in Tan.
Plate 1 x 2 with Handles on Both Sides — Part 3839 (older mold 3839a, current 3839b)
Colors: Black (383926 for 3839b)
Note: the Ant uses this shape in Dark Red, a color this part was never made in, so the Ant piece is listed by description only.
Plate 1 x 2 with 2 Open O Clips on Top — Part 60470b
Colors: White (6347287) · Black (6310268) · Green (6347288) · Yellow (6337231) · Red (6360036)
Note: also used in Bright Pink and in Blue in these kits, colors with no genuine catalog version.
Plate 1 x 2 with Clip on Top — Part 92280 (newer design 44861)
Colors: Yellow (6171814) · White (4598527) · Black (4598528)
Note: also used in Green, Blue and Lime in these kits, colors with no genuine catalog element recorded.
Plate 1 x 2 with Clip on Side — Part 11476
Colors: Dark Red (6313126)
Plate 1 x 2 with Clip on End — Part 63868
Colors: Green (design matches; no catalog element recorded for Green)
Hinge Plate 1 x 2 Locking with 2 Fingers on Side — Part 60471
Colors: Black (4515340)
Note: also used in Tan, Trans Black, Dark Green and Bright Pink in these kits, colors with no genuine catalog version.
Plate 1 x 1 with Open O Clip — Part 61252 (thick mold 52738)
Colors: Black (6308000) · Light Bluish Gray (6335378) · Dark Red (6360110) · Yellow (6347294) · Tan (6347292) · Orange (6347295) · Lime (6383304) · Green (4597272) · Blue (6347291) · White (6347293) · Red (6335377) · Dark Brown (6460688)
Note: the Rhino Beetle uses this piece in a light blue that has no catalog element unless it proves to be Medium Azure (6176255).
Plate 1 x 1 with Open O Clip, Clip Faces Up — Part 4085d
Colors: Black, the Spider eye stalks
Plate 1 x 2 with 1 Stud (Jumper Plate) — Part 3794b
Colors: Black (379426)
Plate 1 x 2 with Small Tow Ball Socket on End — Part 14418
Colors: Tan (design matches; no catalog element recorded for Tan; if the socket sits on the side instead, the part is 14704)
Brick 1 x 1 — Part 3005
Colors: Dark Red (4541376)
Brick 1 x 1 with Stud on 1 Side — Part 87087
Colors: Yellow (4624985) · Tan (4579260) · Black (4558954)
Brick 1 x 2 with Studs on 1 Side — Part 11211
Colors: Tan (6024495)
Brick, Round 1 x 1 Open Stud — Part 3062b
Colors: Black (306226) · Tan
Listed by description only, no catalog match
- Plate 1 x 1 with a tow ball on the side (Grasshopper)
- Holder plate with two upright prongs (Caterpillar, Ant, Lacewing)
Tiles
Tile, Round 1 x 1 — Part 98138 (current design 35381)
Colors: Dark Red (6284585) · White (4646844) · Bright Pink
Note: the Butterfly wing disc tile looks slightly translucent. If it lets light through, its design number is 35380 instead.
Tile 1 x 2 with Groove — Part 3069b
Colors: Dark Red (4539090) · Green · Blue, from the Rhino Beetle
Tile 2 x 2 with Groove — Part 3068b
Colors: Dark Brown · Reddish Brown
Tile, Round 1 x 1 Quarter — Part 25269
Colors: Yellow (6228969) · Lime (6211875) · Green (6150607, standard Green) · Purple · Light blue (if the color is Medium Azure, 6150307)
Tile, Round 1 x 2 Half — Part 23647
Colors: Trans Clear (Bee and Lacewing wing pieces) · Dark Red, from the Ant (no catalog version in Dark Red could be confirmed)
Slopes, Wedges and Curved Pieces
Slope 30 1 x 1 x 2/3 (Cheese Slope) — Part 54200
Colors: Black (4504382) · Green · Light blue · Pink
Slope 45 1 x 2 — Part 3040
Colors: Tan
Slope 45 2 x 2 — Part 3039
Colors: Dark Brown
Slope, Curved 2 x 2 x 2/3 — Part 15068
Colors: Earth Green (6101285) (if the piece is the brighter standard Green instead, 6116259) · Tan (6046924) · Dark Red · Light blue
Slope, Curved 1 x 2, No Studs — Part 11477
Colors: Black · Green · Dark Green · Reddish Brown · Medium Azure (likely the Rhino Beetle blue)
Note: the Firefly uses this shape in a smoky translucent color. No genuine catalog version in that color could be found, so that one piece is listed by description only.
Brick, Round Corner 2 x 2 Macaroni with Stud Notch — Part 85080
Colors: Dark Bluish Gray (6360619) · Reddish Brown · Tan
Tile, Round Corner 2 x 2 Macaroni — Part 27925
Colors: Reddish Brown, the Snail shell base
Wedge, Plate 2 x 2 Right — Part 24307 · Wedge, Plate 2 x 2 Left — Part 24299
Colors: Dark Bluish Gray (Right 6143417, Left 6143423) · Black
Wedge, Plate 3 x 3 Cut Corner — Part 2450
Colors: Bright Pink
Wedge, Plate 2 x 2 Cut Corner — Part 26601
Colors: Bright Pink · Light Bluish Gray
Wedge, Plate 2 x 4 — Part 51739
Colors: Transparent (6187591), the Lacewing wings
Wedge Slope 1 x 2 family — Parts 29119 (Right) and 29120 (Left) if bowed, Part 3040 if straight
Used in the Cicada, Mosquito, Bee, Rhino Beetle, Stag Beetle, Caterpillar, Cockroach and Mantis. The Mantis lime leaf pieces match 29119 and 29120 best.
Cone 1 x 1 — Part 4589b
Colors: Black (458926)
Dome 1 x 1 — Design 6908
Colors: Lime · Black · Tan, a new 2025 design that matches the small dome caps
Dish 2 x 2 Inverted — Part 4740
Colors: Reddish Brown
Note: the Snail shell dish carries a spiral print. No genuine catalog print like it exists, so the print is unique to this kit and carries no print number.
Listed by description only, no catalog match
- Translucent smoky wing plate with studs (Bee)
- Long curved arch pieces (Grasshopper, Lacewing) — nearest catalog family is the curved brick 10314, not confirmed
Bars, Arms and Special Pieces
Bar 1L with Clip Mechanical Claw — Part 48729b
Colors: Black (6278152) · Reddish Brown (6423197)
Note: the standard leg piece in most kits. It also appears in Tan, Green and Yellow in these kits; the design matches, but no genuine catalog element exists in those colors.
Arm Mechanical, Thin Support — Part 53989
Colors: Black (4623154) (a thicker version of the same arm is Part 98313, Element 6276867)
Bar 2L with Towball — Part 22484
Colors: Black (6509664)
Plate, Round 1 x 1 with Bar Handle — Part 26047
Colors: Tan · Orange, the eye stalk holders in the Grasshopper and Lacewing
Brick, Round 2 x 2 Dome Top — Part 553
Colors: Dark Red · Reddish Brown
Dome 2 x 2, Inverted with One Stud — Part 15395
Colors: Dark Red · Reddish Brown (design confirmed)
Bracket 1 x 1 to 1 x 1 — Part 36841
Colors: Black, the Moth bracket
Brick, Round 1 x 1 with Through Hole — candidate Part 85861
Colors: Black, Dragonfly and Moth eye mounts
Listed by description only, no catalog match
- Segmented joint arm, clips and ball joint (Spider legs, Firefly, Lacewing, Grasshopper, Cockroach)
- Angled joint piece with socket (Scorpion claws and tail, Stag Beetle mandibles)
- Curved horn, bar base (Scorpion, Stag Beetle). The nearest catalog piece, Part 16770, attaches with a clip instead of a bar, so no match is claimed.
- Forked horn (Rhino Beetle)
- Antenna bar with a ball at both ends (Snail, Ant, Caterpillar)
- Fluted stacking discs and large disc (Dragonfly)
- Small bush and pin pieces (Cicada, Mantis, Rhino Beetle, Firefly), shown at family level only
- Blaster shaped piece (Firefly)
- Bulb piece (Firefly)
- Tooth pieces (Caterpillar)
- Curved blade (Mantis)
- Rounded belly segments (Spider)
- Small piece with two upright clips (Rhino Beetle)
Eyes and Printed Pieces
Eye print, large black pupil on white
Matches a genuine catalog eye print. Designs 13360, 19241, 73809, 73811; Elements 6284599, 6284604, 6329607, 6329648, all on the round 1 x 1 tile.
Eye print with eyelashes, on white (Moth, Dragonfly)
Matches a genuine catalog eye print, most likely designs 73809 or 73811 (Elements 6329607, 6329648).
Listed by description only, no catalog match
- Eye tile with concentric ring print, black with white rings (Fly, Snail)
- Eye tile with concentric ring print, white with black rings (Ant, Mantis, Spider, Stag Beetle, Firefly)
- Scorpion eye tile, white with a thin yellow ring, large black pupil and white highlight — no genuine print with this recipe could be verified
