[Jacques]

Hmm... don't know how much younger your sister is, but if she's near enough your age for them to fit, go and ask her if you can borrow the top/ shorts for tomorrow- and let her choose for you.

If you're still bored, try and do some easy yoga positions, removing one piece of clothing after each until you perform the last naked

Or go outside, pick some flowers and make them into chains, then sit at your laptop for ten mins wearing only those chains (or the chains and underwear if you're still doing the wedgie.