If you've ever played Angry Birds and thought 'this is alright but I need to step up the realism', this gadget/DIY job is for you.
In their efforts to turn Angry Birds into a real sport, mbed have created a USB slingshot as equipment. While we doubt the logic in this (we don't know of any olympic games that use a child's slingshot) we like the idea.
They've even laid out how to do it yourself on their website - which might be a fun thing to do if you know your way around making your own USB devices. We'd avoid it if you're still struggling to finish that Ikea desk though.