Tumi-ishi Balancing Rock Blocks-24 PiecesSimple stacking game from Japan that challenges balance and focus. Goal is to stack and balance the wooden rocks into a pyramid tower. Every piece has a unique shape and size. Addictive yet simple play for children and adults alike. Builds perseverance, patience, and coordination. Exercises hand eye coordination, balance, and concentration. Encourages creativity, imagination, and social skills. Develops fine motor skills and logical thinking.