- Let your children unleash their creativity and build their own vehicles with the K'NEX Vehicles Building Set;
- Includes 5 after-build experiments that teach your child about STEM concepts like potential and kinetic energy, velocity, inertia and more;
- 131 pieces including two spring motors. Builds 7 vehicle models with different power sources: push power, rubber band, wind, and spring motor. Ideal for learning at home.