Hum... the usual really... made sand castles, i really use to like making water systems with tunnels and stuff out of sand, I made them in such a way that when the tide came in they filled up with water so i did not have to try to fill it with a small bucket.
Oh, oh and also got berried compleatly once by 2 females.....

I had very limited movement, every time I moved and tried to make some room more sand would come in the fill the gap I just made but in the end I managed to get out of it by myself. I soon retreated that as I dont like the feel of sand between my toes....