Mad Marbles

Circa 1980's?
(plastic, 1.8 inches square by 2 inches high)

This puzzle is similar to (but not the same as) the 3x3x3 Varikon Box, where balls are moved by tilting the box. The colored balls surround a 1 by 1 by 3 unit high core, so that when solved, there are 8 green balls in the bottom layer, 8 blue balls in the center layer, and 7 red balls in the top layer.