I try tokeep itunder $20. Each of the kids gets about 10 invites a year times $20, it's a budget that's very easy to blow if I'm not careful! I try to pick stuff up on special when I see it. The bulk of parties we are invited to require girly presents so I usually have some books, games and dolls stashed away. I get a pack of 10 blank cards from the $2 shop so the kids can decorate and write their own cards (expensive cards still just go in the bin next week). If it's a close friend or I see something that is perfect for the child the I'll spend a bit more.