What would you do with $800/mo for daily living?

Hi Friends,

I'm trying something new, due to my new temporary budget.

I will have $800/mo until my lawyers are done fighting my cheap ass ex, so I need your help!

Currently monthly non-negotiable bills:

Phone $50
Gas $300
Medical: $25

That leaves about $500 for kid and daily stuff. I drink coffee sporadically, which would be at home. I could put all grocery and home stuff on hold (live with parents), so what would you allot to 2 kids aged 7 and 9 for playdates, activities with friends, personal, etc?