My baby ball python won't eat.

[Marzipan]

Force feeding unfortunately didn't solve the base issue you're having. There is a husbandry/setup reason that he is not eating, and it's a very common issue with new owners and baby ball pythons. The next time you offer, he is most likely still going to refuse.

It would be good if you could post a pic and describe the setup you have for him!

^^^

I also just want to add, you said he was an 'active boy' - sometimes activity isn't a good sign. Is he constantly pacing or moving in his cage? I've read that sometimes this means that they are stressed out and looking for ways to escape.