Make a hand-waving vehicle
Build a machine that rolls forward and backward to power a wave!
Download Guide
Collect Badge
In this article
Mechanical Engineering
Step 1
Build a machine that rolls forward and backward to power a wave!
Final steps
You're almost there! Complete all the steps, bring your creation to life, post it, and conquer the challenge!
Complete & Share
Get 7 days of DIY for FREE!
Our Mission
To create a safe space for kid creators worldwide!
Games & Tools
2025, URSOR LIMITED. All rights reserved. DIY is in no way affiliated with Minecraft™, Mojang, Microsoft, Roblox™ or YouTube. LEGO® is a trademark of the LEGO® Group which does not sponsor, endorse or authorize this website or event. Made with love in San Francisco.