Ideas for a kids online birthday party?

My little sister is turning nine and I've told her I'll figure out how to make an online party work lol. I've sent out little packets to five of her friends with little art things so they can do that (little horses to paint, dreamcatcher kits, etc), so they can do that as an activity. And I'll be giving them little prompts to act out (basically improv) but I've not got many other ideas lol