Although this isn't a new idea, adding the ability to fly would be incredible for these robots! Also, animal-shaped robots may get kids more interested in this technology.
Other robots from Synthiam community

Ezang's RGB Arduino, Python Code With ARC
Here is an example of using the ARC serial monitor I am using an Arduino, Python code, with ARC - watch the R G B light...

Bhouston's Another Inmoov Modification
I redesigned the Top Stomach Pistons for quicker movement. The STL files are on Thingiverse....

Cardboardhacker's Technopro's Wall-E Continued
I have gotten half way through my wall-e and the comments stopped so im reposting it. I just got my needed servo...