Robotic Arm Trainer Build and observe the dynamics of gear mechanisms through the transparent Arm. Five motors and five joints allow flexibility and fun!$84.95 4 in 1 Robot Kit Discover the dynamics of animal locomotion. The 4 in 1 Robot will be your friend the moment it arrives.$31.95 Ultimate Robot Kit Construct five amazing "bots," each with its own special talent! Ages 8+.$29.99 Climb@Tron™ R.E.X. Robot Explorer Walks up windows and climbs filing cabinets using powerful suction cups! Ages 7+.$11.95 Erector Speed Play Interactive Robot Speed play interactive robot features the new construction method for Speed Play which allows for quicker assembly Tools and instructions included.Builds 6 different models.$119.95