Puzzle toy、 easy to carry、 convenient to use、 you can play with it in anytime anywhere. Good for both the young and old. Can prevent alzheimer's disease for the elderly. Dimensions: 3.07 in x 3.03 in x 3.03 in (7.8 cm x 7.7 cm x 7.7 cm) Weight: 3.60 oz (102 g)