I designed a simple insect robot for kids.

Print, built and add two (or one) small DC motor, then it walks!
You also need few screws, skewers, wires and battery box.
2ch remote can be downloaded from my things list soon.
Building instruction may be supplied upon your request.

Small DC motors can be purchased from elsewhere, such as Hobbyking or banggood.
FYI, you can google "DC 3V-6V Dual Axis Gear Reducer Motor", but I don't want to put the link here.

I hope you enjoy this and If you liked it, please visit our blog for more idea about hands-on science education.
https://scienceinyourhands.wordpress.com
Any inquiry, mail to info@handson-science.com.