Here’s a fun, totally safe way for young builders to familiarize themselves with tools and mechanics—and develop manual dexterity as they get creative! This set includes 4 kid-safe plastic tools—2 screwdrivers and 2 wrenches. Kids use the tools to attach the building pieces to the included base or to each other—constructing mosaics, 3-D structures and more! Durable plastic set includes a base, 4 tools, 75 building pieces in various styles and an instruction booklet—all in a storage case with a carrying handle. Storage case measures 11 1/2"l x 8 1/2"w x 1 1/2"h.