Well, the kindergarten received 11 permission slips at the end of term last year (ours included) so I'll need 10 stickers, unless the two kindergarten teachers would like one each.
Not much of a joke teller but here is my son's favourite joke which he tells my wife up to 15 times a day.
What did the astronaut say after eating his first meal on the moon?
"The food was good, but the place lacked atmosphere.
I don't think he really gets the atmosphere bit but we all laugh when he tells it so he thinks it's funny. He is absolutely crazy for space and got me into the kinder by telling the teachers that we have the hubble space telescope in our backyard (the 12" Dob)