224 piece stem building toys for kids 4 5 6 7 8 year old, trendy bits drill puzzle with screwdriver tool set, mosaic drill set for boys and girls ages 4-8 supstem this mosaic puzzle and building toy for kids comes with 224 pieces. supports stem education - designed to enhance your children's science, technology, engineering, and math skills. trendy bits mosaic drill set for kids drill toy drill set for kids kids drill and screw set stem projects for kids ages 4-8 kids drill set trendy bits drill for kids the trendy bits drill set for kids kids building toys building toys for kids ages 4-8 boys building toys age 6-8 building toys for kids ages 3-5 stem toys for 3+ year old drill set kidsimprove your kids' imagination and creativity by challenging them to build 2d&3d puzzle and button art puzzle! create your own 3d world - many take apart blocks in various colors and shapes, an electric drill, a screw driver, and 3 different shaped screws.