That is one cute pony - he will probably never be an equine! Will love to see how he matures and if he still plays with his dog friends and chases sticks.
I had a little mare that would roll over on her back to get her tummy scratched - my vet thought she was colicing because she would come over, lean against our legs and then go down and roll. Went on & on until we finally stopped and gave her tummy a good scratch and then she was up, shaking her head and bouncing off as happy as could be. After that, whenever my vet came, he would scratch her tummy first and then get down to business - still makes me giggle to remember how persistent she was.