Sort three-dimensional objects according to particular attributes, eg the shape of the surfaces

1. Same Size, Different Shape? - select shape with same volume
2. Same Size, Different Shape? - select object with same volume
3. Surface Study - flat surfaces
4. Surface Study - curved surfaces
5. Box It Up 3 - select correctly shaped box for given lid
6. Box It Up 2 - select correctly shaped box for given lid
7. Fascinating Faces 3 - select all shapes with circular face/s
8. A Block Of Many Faces 2 - select shapes with triangular face/s
9. A Block Of Many Faces 1 - select shapes with rectangular face/s