[Build n Learn] This Building Toys Set is a great STEM toy for 3+ years old kids, it develops fine motor skills, hand-eye / hand-hand coordination, construction and engineering simulations and creativity. It’s great gift for toddler boys and girls to keep them engaged for hours and keep them away from screen while learning important math and engineering basic skills and imagination. [Expandable 3D 228 Pcs Building Set] This unique screw puzzle set expands and create different 3D scenes. Includes inter-changeable drill bits, reversible electric drill (requires 2 AA batteries, not included), chunky plastic nuts and bolts, screwdriver, screw, wrench, instructions with patterns, scene cards. All the items can be stored inside portable design carrying case with handle. [Safe Play] When it comes to your child's playtime, safety is our top priority. The parts of our kid-friendly building toy sets can be conveniently kept in plastic containers for quick cleaning and storage, and they are safe for kids of 3+ years. Available in 3 high-demand, favorite styles, Dinosaur, Unicorn and Space.