Super easy to build - nine kinds of parts to build a unicycle transforming robot Biky LEGO MOC build - Bilibili
Easy LEGO Robot Activity - Little Bins for Little Hands
10693 LEGO® Creative Supplement - building instructions | Official LEGO® Shop US
Amazon.com: LEGO MINDSTORMS Robot Inventor Building Set; STEM Kit for Kids and Tech Toy with Remote Control Robots; Inspiring Code and Control Edutainment Fun (949 Pieces) : Toys & Games
Making robots out of recycling... and Legos! - Unschool RULES