wow there are some top ideas here.
C I can't belive she's 18!!!

I was going to type 2 things but they may or may not be suerfluous.
Firstly for mini pizzas, if it's easier buy a bit premade frozen pizza and use a large circle biscuit cutter once cooked to cut out mini ones.
Secondly the current issue of Good Food has a fantastic bit on finger food and some of it sounds pretty s****y.