550Pcs Electric DIY Drill STEM Puzzle Toy Set, Creative Mosaic Drill Puzzle Kit, 2D 3D Educational Building Blocks,Age 3-12 Years OldConstruction Toys 550 PCSThe electric drill puzzle includes a carrying case with nail plates on both sides, an electric drill (requires 2 AA batteries, not included), a screwdriver, wrench, screws, colorful flowers, triangle, square, and round accessories. The STEM toy comes with some design manuals, which brings some inspiration for the children. Kids only need to use a drill, pick up the nuts and screws to assemble the panel to the nail plate to