CHILD BRAIN DEVELOPMENT - The PicassoTiles marble run promotes problem-solving skills, hand-eye coordination, and trains fine motor skills through play. This stacking, building block kit features quick-connect, magnetized, vibrant tiles that allow children boys & girls ages 3+ to easily construct their masterpieces using early STEM (science, technology, engineering, and math) education, brainpower, creative imagination, and insight into magnet polarity. In the Box: 78 x magnetic square with circle center 46 x long straight slides/support columns 18 x quarter round turns 18 x short straight slide 8 x U-turn slides 7 x steel-weighted marbles 4 x long slides 4 x spinning funnel tray 4 x isosceles triangle 4 x equilateral triangle 2 x Y-shape 2 x right triangle 2 x stair slide 2 x T-shape slide and drop 1 x square