I am organising a party for my son who will be 7, I think about 25 kids we have a bouncy slide (my son's request) and a hall and we are going to do a few games. Do you think I should hire a bouncy castle as well? My son will happily go on the slide but I understand that not all will or shall I just get some craft bits and have a craft table set up? I am thinking for ease I am just going to order them all pizza and maybe some snacks but how many pizzas do you think I would need? Would you think a couple of slices each? They'll be mainly 6/7 years olds. Thank you X