Can anyone tell me what the name if this is?

My son has had this transformer for about 3-4 years and is just now starting to play with it. I've tried to find the instructions online, but without know it's name it's time consuming. We can't figure out how to transform it without the instructions. I do now it transforms into a sphere of some sort. Can anyone out there tell me the name?
Thanks in advance.
Thanks in advance.