This TV show, which airs on PBS in the USA and TV Ontario in Canada, is full of transformation scenes. The Kratt Brothers [Chris in green, and Martin in blue] have special suits that can turn them into plot-relevant animals.

https://tvokids.com/school-age/wild-kratts
http://pbskids.org/wildkratts/

Thanks.
I've checked and I got PBS. I've added the show to my PVR and started recording them.