Big drops, wild loops, and plenty of “what if?” moments! Turn playtime into an amusement-park engineering adventure as curious builders design, test, and tinker with their own working roller coasters.

• Build dozens of models with sturdy modular pieces and flexible track. Experiment with taller hills, longer straightaways, loop-de-loops, car weight, and track slope, length, and direction.
• Explore gravity, force, motion, friction, and potential and kinetic energy through hands-on STEM challenges. A full-color manual provides illustrated, step-by-step building and experiment instructions.