My son's birthday was this past weekend. He loves football and always has a bunch of friends over for his birthday party. Needless to say, all they do is play football. It makes for an easy event for me! Here is the invitation that I created for his party. Since it is a bunch of kids, AND boys, to save a little paper (since you know they just get thrown away) the invitation is sort of a postcard.
I found this idea from Tanya Boser on Stampin' Connection.