Any tiny skinny bony people here? How cold is too cold? It's nearly my birthday, and I haven't had a party for two years (well. that I've organised, last year my amazing friends threw me a surprise one, I had no idea

). So this year I WILL have one, I've decided.
Anywho, I think sleepovers are always good, but I have 15 people I'd want to invite... and my grandparents have offered to let me use their playroom! It's like an extension to the house, so we can make as much noise as we want without disturbing my grandparents/parents.
BUT it gets very cold there in the winter, and although it has radiators, it has a concrete floor with a thin carpet, and big thin windows. We're not sure if it'll be too cold for all my friends

My family and I don't really get cold, because we're built quite big, and are a bit more padded than most
If we told them all to bring a hot water bottle, and a sleeping bag, and a quilt, and pillows, and tracksuit bottoms to put over their pyjamas, and thick socks, and a dressing gown, etc etc would that be ok? I could probably also get lots of those handwarmers from the local ski shop too.