Roller Coaster Engineer deals featuring a Starter Brick for

featuring a Starter Brick for a quick build

Master motor skills as you grip

The wheels spin and the spoiler jumps as it rolls

The Hot Wheels City Tunnel Twist Car Wash adds a twist to the color-changing action with an innovative water-spraying tunnel

Contents Include: 6 Artist Quality Paint Brushes of varying sizes

Roller Coaster Engineer deals featuring a Starter Brick forBuild and experiment with dozens of roller coaster models to make learning the physics of force, motion, and energy as fun as a day at the amusement park. Experiment by varying the weight of the cars and varying the slope, length, and direction of the track. Get a practical introduction to many physics principles including gravitation, potential energy, kinetic energy, free fall, projectile motion, friction, centripetal force, velocity, acceleration,