I got this one from my Uncle over the Christmas Holidays, I've no idea where he got it from....
A seven year-old turns up in his classroom one morning to be confronted by his teacher:
Teacher: Morning Tommy, and why weren't you at school yesterday?
Tommy: Well Miss, my Grandad got burnt.
Teacher: Oh Dear, he wasn't too badly hurt I hope?
Tommy: Oh yes Miss, they don't fuck around at those crematoriums.