If all else fails, create something that is fun or weird (Hot Tub Time Machine Calculator?). Bonus point go to apps that can tie in with our fellow API sponsors, Open-tok, Paypal, foursquare, box, twilio, mashery (and their hosted APIs), and factual.
Spikeball: This 2-on-2 game is a cross between volleyball and foursquare. Players are allowed up to three touches before they need to bounce the ball off the net to change possession. It's big on college campuses, so think of this as preparing your kid for college. 2b1af7f3a8