PBS
Pbs Kids: Odd Squad: Games: Pienado
In this game, you will need to fix the holes in the force field by patching them with various shapes to fill up the holes.
ClassFlow
Class Flow: 2 D and 3 D Shapes
[Free Registration/Login Required] This flipchart explains 2-D and 3-D shapes.
University of Cambridge
University of Cambridge: Nrich: Wag Worms
Use this challenge to see how many unique shapes can be created using exactly 5 cubes. At this one page website you can also check your results.