ETI Toys Lil Engineers 101 Piece STEM Building Blocks Construction Set with Case ETI Toys Lil' Engineers 101-piece STEM construction set provides an engaging way for young builders to develop spatial thinking and hand-eye coordination. This building kit includes a variety of colorful nuts, bolts, blocks, and wheels stored in a clear plastic carrying case with a secure locking lid. The included full-color idea booklet features step-by-step instructions for 12 projects ranging from easy to advanced levels, including a duck, dinosaur, robot, and helicopter. Designed for children ages 3 and up, these BPA-free pieces are sized perfectly for small hands to grasp. The set encourages creative problem-solving and fine motor skill development through open-ended play or guided engineering challenges. All components are accounted for and presented in their original storage container.