My daughter has a December birthday, and we are throwing her first friends party this year (she's turning 4). We're inviting her whole preschool class, plus a few other friends, so it could end up being a pretty big party (hopefully not too big, so close to the holidays). Instead of gifts, I thought that we could collect donations for Toys for Tots. What is the best way to express this clearly on the invitations? Any clever ideas?