As long as I'm posting things to do outside as the weather warms up, I might as well mention this one. I saw a television commercial for this Phlat Ball a few days ago, and it looked really cool. You crush it into a disc and fling it, and as it flies through the air, it pops back into a sphere. Pretty cool! It looks like a fun and unique toy that any kid or cubicle-dweller could enjoy. $16.99 USD.