3-in-1 STEM Toy - With 361 pieces, our 3-in-1 buildable vehicle is the perfect project for any child interested in STEM. Using the instructions provided, your child can challenge their creative and technical skills together, assembling their own dump truck, pick-up truck, or even an airplane! The perfect introductory tool for any boy or girl with an interest in technology and engineering, and an even better bonding excercise between a child and any parent, grandparent, or friend!Realistic movement and mechanisms - No matter what form your child chooses to build, our 3-in-1 toy features realistic and faithful mechanisms that will help anyone building it to understand the logic behind the physics. Dump truck form features a working bump bed, and a propeller that spins when moving in plane mode.Tough Toys - Our toys are built to last, no matter how they're handled. Our assembled pieces are constructed to ensure they won't ever break down during use. And best of all, if anything were to break apart, simply snap it back together, or break it down more, and build it back anew in another form. The STEM toy is a perfect stem projects for kids ages 8-12 to encourage learning of mechanics and engineering.