Ok, kiddo, you say you're so big, then go ahead and pull these undies up and over your cute, thicker, "underwear". Why? Because we don't want sand getting into your leakguards and making you get all rashy, of course. Oh, you're still fussing about it? Fine, sit down here and let a grown-up help you pull these up over your diaper, while your friends watch. Ok, you're ready to show off how grown-up you are now!
I'm sure your Sea Buddies will see your buddies, right?