USATDD Balance Puzzle Chairs Board Table Game Stacking Balacing Blocks Intelligence Multiplayer Toy for Family Kids Birthday Gift 18 Pieces INTELLIGENCE: Help Trainning hand-eye coordination, balancing, problem solving, memorizing and other important learning skills FUNNY: There are 18 chairs which have to be stacked in a certain pattern, without falling or dropping in mid-way, so that the pile remains steady and stable COLORFUL:bright primary colors,red,green,blue and yellow. CHALLENGING: So many different ways to stack you'll never have the same game twice. Could somewhat lower difficulty, with other hand help hold nethermost bottom stool BEST GAME: Great game for all ages and is designed to entertain and stimulate the mind. Recommended for children 3-years of age and older