| Image | Item No. | Description | By |
| 3062 | Brick, Round 1 x 1
Catalog: Parts: Brick, Round | 7838 |
| 3062a | Brick, Round 1 x 1 - Solid Stud, Bottom Lip
Catalog: Parts: Brick, Round | 30 |
| 3062old | Brick, Round 1 x 1 - Solid Stud, No Bottom Lip
Catalog: Parts: Brick, Round | 18 |
| 20952 | Brick, Round 1 1/2 x 1 1/2 x 2/3 Dome Top
Catalog: Parts: Brick, Round | 2 |
| x12 | Brick, Round 1 x 1 with Ball (Finial)
Catalog: Parts: Brick, Round | 5 |
| 4588 | Brick, Round 1 x 1 with Fins
Catalog: Parts: Brick, Round | 2 |
| 71075 | Brick, Round 1 x 1 x 1 2/3
Catalog: Parts: Brick, Round | 4 |
| 3386 | Brick, Round 1 x 1 x 2/3 Half Circle Extended with Side Stud
Catalog: Parts: Brick, Round | 3 |
| 77808 | Brick, Round 1 x 2 with Hollow Studs and Open Center with Bars
Catalog: Parts: Brick, Round | 1 |
| 65473 | Brick, Round 2 x 2 D. 45 degrees Elbow (25.5mm Standing Height)
Catalog: Parts: Brick, Round | 350 |
| 15395 | Brick, Round 2 x 2 Dome Bottom
Catalog: Parts: Brick, Round | 52 |
| 24947 | Brick, Round 2 x 2 Dome Bottom with Studs
Catalog: Parts: Brick, Round | 13 |
| 553 | Brick, Round 2 x 2 Dome Top
Catalog: Parts: Brick, Round | 206 |
| 553a | Brick, Round 2 x 2 Dome Top without Bottom Axle Holder
Catalog: Parts: Brick, Round | 29 |
| 20953 | Brick, Round 2 x 2 Sphere with Stud / Robot Body
Catalog: Parts: Brick, Round | 13 |
| 3941 | Brick, Round 2 x 2 with Axle Hole
Catalog: Parts: Brick, Round | 343 |
| 92947 | Brick, Round 2 x 2 with Axle Hole and Grille / Fluted Profile
Catalog: Parts: Brick, Round | 47 |
| 17485 | Brick, Round 2 x 2 with Pin Holes
Catalog: Parts: Brick, Round | 7 |
| 30151 | Brick, Round 2 x 2 x 1 2/3 Dome Top
Catalog: Parts: Brick, Round | 3 |
| 30361c | Brick, Round 2 x 2 x 2 Robot Body - with Bottom Axle Holder x Shape + Orientation
Catalog: Parts: Brick, Round | 1 |
| 30361a | Brick, Round 2 x 2 x 2 Robot Body - without Bottom Axle Holder
Catalog: Parts: Brick, Round | 1 |
| 49308 | Brick, Round 3 x 3 x 1 1/3 Dome Top - Open Stud
Catalog: Parts: Brick, Round | 1 |
| 79850 | Brick, Round 4 x 4 Dome Top with 2 x 2 Recessed Center
Catalog: Parts: Brick, Round | 1 |
| 87081 | Brick, Round 4 x 4 with Hole
Catalog: Parts: Brick, Round | 7 |
| 65138 | Brick, Round 4 x 4 x 2/3 Dome Top with Hole
Catalog: Parts: Brick, Round | 1 |
| 18897 | Brick, Round 6 x 6 with 4 Side Pin Holes and Center Hole
Catalog: Parts: Brick, Round | 1 |
| 3063 | Brick, Round Corner 2 x 2 Macaroni with Stud Notch
Catalog: Parts: Brick, Round | 36 |
| 85080 | Brick, Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside
Catalog: Parts: Brick, Round | 730 |
| 3063a | Brick, Round Corner 2 x 2 Macaroni without Stud Notch
Catalog: Parts: Brick, Round | 5 |
| 65617 | Brick, Round Corner 3 x 3 x 1 without Studs
Catalog: Parts: Brick, Round | 3 |
| 88293 | Brick, Round Corner 3 x 3 x 2 Dome Top
Catalog: Parts: Brick, Round | 56 |
| 48092 | Brick, Round Corner 4 x 4 Macaroni Wide with 3 Studs
Catalog: Parts: Brick, Round | 3864 |
| 49612 | Brick, Round Corner 4 x 4 x 2 2/3 Dome Top
Catalog: Parts: Brick, Round | 11 |
| 24599 | Brick, Round Corner 5 x 5 x 1 without Studs
Catalog: Parts: Brick, Round | 3 |
| 95188 | Brick, Round Corner 6 x 6 with Slope 33 Edge, Facet Cutout
Catalog: Parts: Brick, Round | 102 |
| 58846 | Brick, Round Corner 10 x 10 with Slope 33 Edge, Axle Hole, Facet Cutout
Catalog: Parts: Brick, Round | 70 |