Oh, well goodie. You deserve this! [She's so directing you to the gift table later, but for now she'll set the ball down in the sand and retreat a few feet away to a towel she left abandoned with her beach bag. She wanted to prepare something more personalized for people but when you know so many folks it's kinda hard to fashion that, so instead...
She pulls out a stack of post-cards, flipping through them until she gets to one with some half dressed people on the front and holds it out to him. On the blank side it'll say a few lines about her being thankful for his friendship and quote: Thanks for always being the smiling sixpack on campus, you're one of a kind Jack!] I had to do these for a punishment originally and I kinda forgot about it, so I turned it into something for today. Happy birthday.