4D Toys!

I am not sure that Ive ever seen a more compelling show-dont-tell educational tool than 4D Toys. Ars Technica What if you received a box filled with mysterious toys from a fourth spatial dimension? Some things to do: Manage to fit the hypercube into the hyperhole Use the 4D shapes as fancy, perfectly symmetric, fair dice that have 5, 8, 16, 24, or even 120 and 600 sides Unbind Rings using the fourth dimension Make a stack of 4D hypercubes and smash it Set up an interesting path for a few 4D dominoes Make levers that throw hypercubes into the fourth dimension Use multitouch to squeeze out objects into the fourth dimension Play in a 4D ball pit See Tesseracts (i.e. 4D hypercubes) slide down slopes etc