hi, yes i paid for all the children. somtimes it is better for the parent if you pay per child, but not always for you. we had to pay a 40 pound deposit and the rest on the day. we booked for 14 kids but only 12 turned up, so we only had to pay for 12.
when i said they didnt get much i mean, for the price we paid it was ok, but the staff didnt really do anything with the children they were left to entertain themselves. so if you are thinkin of doing activities with them and playing with them then i would charge more.
i would think maybe 8-10 pound per child, to include party food, singing and games, and maybe face painting and if they want a themed party them rise the price to maybe an extra 2-3 pound per child.