Gendernot specified unisex shapesphere cylindrical pieces432 materialmagnet metal note3mm magnetic balls 2216pcs same color balls 2 color choose 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 net dimensionscm3mm diameter ball 666 pcs 2 216pcs 2 shipping weightkg0086 package dimensionscm757545 net weightkg0086 li