What has gone down spectacularly well at a children's party you've organised - and what flopped? What great things have you envied seen at parties you've been to with your child, or that other people have told you about? 
So tips on games, party food, birthday cakes, best/worst themes, party bags, presents, places to go/avoid - we want your children's party know-how.
Add your tips to this thread and one winner will get an Argos voucher for £100.
We'll use a selection of your tips on an upcoming Chad Valley hub [technical speak] on Mumsnet.
Many thanks
MNHQ