Julian
I do know that, and I wouldn't have asked you if I minded a mess like that. I'm having Sweet Nothings provide the cupcakes and the decorations and will leave the decorating up to the kids (and the adults, if they want to), and though I'd love to spend all the time there myself, I'm afraid I may be needed elsewhere.
Wallace is welcome, too, just keep an eye on the chocolate; I've heard doggies aren't too good with that.
It's all magic. They're doing the Muggle birthday with their friends at school the following Monday, so bring all the charms and enchantments.