Made of ABS material. Designed in rainbow color, squeeze this stress ball fidget toy with you fingers to relieve stress, anxiety, anger, or use as a form of calming toy t o aid in concentration and focus. Rainbow ball cube is a color-matching fidget toy that is shaped like a ball. It has 12 equally sized holes around, and 11 balls which are slightly bigger are inside. You need to match all balls to their corresponding colored rings to complete the puzzle.