Dad jokes - I'm in need of something fresh

My kids are 17, 15, 14 and 3. The eldest have heard my repertoire over and over again. I speak of my beloved dad favourites such as:

2 cows are in a field. One turns to the other and says "Moo!", the other cow says "Oi, I was going to say that."

2 sausages are in a frying pan. One says "Phew, it's hot in here!" And the other says "Oh my God. A talking sausage!"

Did you hear about the magic tractor? It was going down the road and turned into a field!

Now that you have finished laughing, I need some fresh stuff. So what hidden gems do you have for me to steal and use to cause more groans?