Meet the Quincunx: a wonderful tool for teaching statistics in a more visual fashion. It has a hardwood construction, measuring 28 in x 14.5 in x 1.5“. It has 3 gates to show 3 different distributions simultaneously. The Quincunx comes with 500 beads (25 beads per channel). It has adjustable pin block to demonstrate different levels of variability.
The bad news? Something like this doesn’t come cheap.