Face Painter requires users to identify the faces of 3D objects that are a certain 2D shape.
Face painter: finding faces 1
Face painter: finding faces 2
Face painter: locating faces
Face painter: predicting faces

Finding Symmetry helps users determine whether shapes have one, two or three lines of symmetry.
Finding symmetry: three lines: garden

NLVM: Space manipulatives
Attribute blocks
Pentominoes
Tessellations
Pattern blocks
Geoboard
Polyominoes