| Image | Item No. | Description | By |
| 3062 | Brick, Round 1 x 1
Catalog: Parts: Brick, Round | 210249 |
| 3062a | Brick, Round 1 x 1 - Solid Stud, Bottom Lip
Catalog: Parts: Brick, Round | 274 |
| 3062old | Brick, Round 1 x 1 - Solid Stud, No Bottom Lip
Catalog: Parts: Brick, Round | 377 |
| 20952 | Brick, Round 1 1/2 x 1 1/2 x 2/3 Dome Top
Catalog: Parts: Brick, Round | 47 |
| 71076 | Brick, Round 1 x 1 d. 90 degrees Elbow Macaroni - No Stud - Type 1
Catalog: Parts: Brick, Round | 145 |
| 25214 | Brick, Round 1 x 1 d. 90 degrees Elbow Macaroni - No Stud - Type 2 - Axle Hole
Catalog: Parts: Brick, Round | 216 |
| x12 | Brick, Round 1 x 1 with Ball (Finial)
Catalog: Parts: Brick, Round | 61 |
| 4588 | Brick, Round 1 x 1 with Fins
Catalog: Parts: Brick, Round | 33960 |
| 71075 | Brick, Round 1 x 1 x 1 2/3
Catalog: Parts: Brick, Round | 425 |
| 3386 | Brick, Round 1 x 1 x 2/3 Half Circle Extended with Side Stud
Catalog: Parts: Brick, Round | 87 |
| 33286 | Brick, Round 1 x 1 x 2/3 with Flower Edge (4 Knobs on Base)
Catalog: Parts: Brick, Round | 55 |
| 77808 | Brick, Round 1 x 2 with Hollow Studs and Open Center with Bars
Catalog: Parts: Brick, Round | 7084 |
| 65473 | Brick, Round 2 x 2 D. 45 degrees Elbow (25.5mm Standing Height)
Catalog: Parts: Brick, Round | 15 |
| 15395 | Brick, Round 2 x 2 Dome Bottom
Catalog: Parts: Brick, Round | 99 |
| 24947 | Brick, Round 2 x 2 Dome Bottom with Studs
Catalog: Parts: Brick, Round | 52 |
| 553 | Brick, Round 2 x 2 Dome Top
Catalog: Parts: Brick, Round | 37543 |
| 553a | Brick, Round 2 x 2 Dome Top without Bottom Axle Holder
Catalog: Parts: Brick, Round | 412 |
| 20953 | Brick, Round 2 x 2 Sphere with Stud / Robot Body
Catalog: Parts: Brick, Round | 10 |
| 3941 | Brick, Round 2 x 2 with Axle Hole
Catalog: Parts: Brick, Round | 108173 |
| 92947 | Brick, Round 2 x 2 with Axle Hole and Grille / Fluted Profile
Catalog: Parts: Brick, Round | 16089 |
| 17485 | Brick, Round 2 x 2 with Pin Holes
Catalog: Parts: Brick, Round | 382 |
| 27266 | Brick, Round 2 x 2 with Spikes and Axle Hole
Catalog: Parts: Brick, Round | 1 |
| 30151 | Brick, Round 2 x 2 x 1 2/3 Dome Top
Catalog: Parts: Brick, Round | 34 |
| 33287 | Brick, Round 2 x 2 x 2 Dome Top with Cross Cut Slots
Catalog: Parts: Brick, Round | 14 |
| 30361 | Brick, Round 2 x 2 x 2 Robot Body (Undetermined Type)
X Catalog: Parts: Brick, Round | 35 |
| 30361c | Brick, Round 2 x 2 x 2 Robot Body - with Bottom Axle Holder x Shape + Orientation
Catalog: Parts: Brick, Round | 10599 |
| 30361b | Brick, Round 2 x 2 x 2 Robot Body - with Bottom Axle Holder x Shape x Orientation
Catalog: Parts: Brick, Round | 93 |
| 30361a | Brick, Round 2 x 2 x 2 Robot Body - without Bottom Axle Holder
Catalog: Parts: Brick, Round | 335 |
| 4591 | Brick, Round 2 x 2 x 2 with Fins
Catalog: Parts: Brick, Round | 7 |
| 49308 | Brick, Round 3 x 3 x 1 1/3 Dome Top - Open Stud
Catalog: Parts: Brick, Round | 682 |
| 73111 | Brick, Round 3 x 3 x 2 with Recessed Center and Axle Hole
Catalog: Parts: Brick, Round | 41 |
| 79850 | Brick, Round 4 x 4 Dome Top with 2 x 2 Recessed Center
Catalog: Parts: Brick, Round | 14 |
| 6222 | Brick, Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole
Catalog: Parts: Brick, Round | 33791 |
| 87081 | Brick, Round 4 x 4 with Hole
Catalog: Parts: Brick, Round | 33139 |
| 68325 | Brick, Round 4 x 4 with Recessed Center and Hole
Catalog: Parts: Brick, Round | 44 |
| 65138 | Brick, Round 4 x 4 x 2/3 Dome Top with Hole
Catalog: Parts: Brick, Round | 1034 |
| 18897 | Brick, Round 6 x 6 with 4 Side Pin Holes and Center Hole
Catalog: Parts: Brick, Round | 1180 |
| 3063 | Brick, Round Corner 2 x 2 Macaroni with Stud Notch
Catalog: Parts: Brick, Round | 3148 |
| 85080 | Brick, Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside
Catalog: Parts: Brick, Round | 5832 |
| 3063a | Brick, Round Corner 2 x 2 Macaroni without Stud Notch
Catalog: Parts: Brick, Round | 34 |
| 5152 | Brick, Round Corner 3 x 3 Macaroni with 2 Studs
Catalog: Parts: Brick, Round | 8 |
| 65617 | Brick, Round Corner 3 x 3 x 1 without Studs
Catalog: Parts: Brick, Round | 32 |
| 88293 | Brick, Round Corner 3 x 3 x 2 Dome Top
Catalog: Parts: Brick, Round | 11204 |
| x1042b | Brick, Round Corner 4 x 2 Macaroni Double with Stud Notches
Catalog: Parts: Brick, Round | 61 |
| 2577 | Brick, Round Corner 4 x 4 Full Brick
Catalog: Parts: Brick, Round | 2197 |
| 48092 | Brick, Round Corner 4 x 4 Macaroni Wide with 3 Studs
Catalog: Parts: Brick, Round | 17715 |
| 49612 | Brick, Round Corner 4 x 4 x 2 2/3 Dome Top
Catalog: Parts: Brick, Round | 60 |
| 47974 | Brick, Round Corner 4 x 8 Full Brick Double
Catalog: Parts: Brick, Round | 1252 |
| 47974c01 | Brick, Round Corner 4 x 8 Full Brick Double with 2 Fixed Rotatable Friction Pins
Catalog: Parts: Brick, Round | 144 |
| 76795 | Brick, Round Corner 5 x 5 with Slope 45 Edge without Studs
Catalog: Parts: Brick, Round | 5 |