As we've reported before, Dads generally have to thread carefully when telling a joke to their offspring. More often than not, it will not be well received no matter how hilarious they think it is.
There are of course exceptions to the rule, such as your Bea here proves. Taking a break from eating her dinner, she's keen for some entertainment to be doled out by her Dad and he didn't disappoint.
You know you're onto a winner when they start laughing before you've given the punchline.
It's nice to know that there is some time in their lives when your children won't be mortified by your sense of humour.