Gendernot specified unisex shapesphere cylindrical pieces432 materialmagnet metal note3mm magnetic balls 216pcs 2 goldensilver 2 color mixed in 1 box diameter 3 age5 to 7 years 14 years up 8 to 13 years category3d puzzles diy kit science discovery toys educational toy magic prop building blocks magnet toys stress relievers magnetic balls holidaychildrens day carnival valentines day birthday christmas new year net dimensionscm3mm diameter magnetic ball 666 pcs 2 216pcs 2