ReBotz Knox Robot: Building and Troubleshooting Guide
By Thames & Kosmos Online Store | Published: 2026-10-28
Category: How-to Guides
Learn how to assemble the ReBotz Knox walking robot, fix common issues, and get it moving smoothly with this step-by-step guide.
Quick Answer
Build the ReBotz Knox robot by following the manual's order: connect the motor, attach the crank and wheels, then test the motion. If it doesn't walk, check the battery, gear alignment, and wheel friction.
Why Build Order Matters
Assembling the ReBotz Knox in the right order saves time and prevents loose connections. The motor must be secured before attaching the crank and wheels, otherwise you risk misaligning the gears.
The kit is designed for ages 6 and up, with one experiment and 13 pieces. It's a quick build, but patience with the small parts pays off.
Common Troubleshooting Scenarios
If the robot doesn't move, the most likely culprits are dead batteries, a jammed gear, or wheels that are too tight against the surface. Check each in order.
The ReBotz Knox uses a slider crank mechanism; if the crank is not aligned properly, the motion will be jerky or stuck.
Step-by-Step Build and Troubleshooting
- Prepare the parts: Lay out all 13 pieces and confirm the motor, crank, wheels, and body parts are present. Check that the battery is installed correctly (if included) or insert fresh batteries. Missing parts? Contact support before starting.
- Attach the motor and crank: Secure the motor to the main body, then attach the crank arm. Ensure the crank rotates freely without rubbing against the body. If the crank feels stuck, loosen the screw slightly.
- Mount the wheels: Push the rear wheels onto the axle until they click or fit snugly. They should spin freely when you turn them by hand. Wheels that don't spin indicate the axle is misaligned.
- Connect the body parts: Attach the tennis racket and hammer pieces as shown in the manual. Make sure they don't obstruct the crank or wheels. Test the range of motion before finalizing.
- Test the walking motion: Place the robot on a flat, hard surface and switch it on. If it doesn't walk, check the battery, gear alignment, and wheel friction. If it still doesn't move, the motor may be defective; contact support.
Product Facts
- ReBotz: Knox - The Wacky Walking Robot: The ReBotz Knox is pieced together from a tennis racket, hammer, and tricycle wheels, and is powered by an electric motor. This unique construction makes it fun to build and demonstrates how wheels and slider cranks convert motor power into walking motion.
ReBotz: Knox - The Wacky Walking Robot
