Convert-o-naut

Convert-a-nauts are toy robots that can change form into vehicles. It appeared in "Buster and the Daredevils."

It is not named, but the transforming toy Arthur plays with at the store in "Arthur Bounces Back" has a similar function to Convert-a-nauts.

The name was also mentioned by Binky in "Ungifted" when Arthur traded the Thresher for the Bionic Bunny Poster.