If you have the opportunity, why you don’t design and build homemade robotic toys with common household materials? The 3D printing technology opens the gates for homemade products, and with few resources and DIY skills, you can have the desired toy in minutes.
In the following, are available a series of some pretty amazing free 3D printer files for robotic toys.
Robot for “Develop 3D” Competition
The multifunctional moveable robot
AT-AS quadruped (or hexapod) robot