Uh, Tangram Erasers? Of course we need a set. Do you know the history of the Tangram? Do you have fond memories of making shapes with one when you were younger? Maybe you could see if your brain still has the skills to hammer out a few puzzles with these erasers, knowing they could always do some erasing if you fail to have fun with the puzzle part.
Updated price and link; originally posted Mar 14, 2017.Available from Kikkerland, $2.50.