You can make a snake that has a rattle that doubles as a sensor to recognize a "threat. " the head could have a camera. The snake would just be pure fun for kids
By RyRy
Other robots from Synthiam community

Fxrtst's Project Gargantua (Or Gar)
Project: By request, my 6 year old son wanted me to design and build him a Hexapod. So I started to whip up some designs...

Cochranrobotics's Inmoov - D.Cochran Style
I have decided to start my InMoov project. I think I will call him Spock out of respect to Leonard Nimoy who passed away...

Zxen's Robomannequin
This is Eve. What do you guys think so far?