Writing Club is mainly about having fun writing, and that's what today's session focussed on. Of course jokes contain puns and wordplay, some of which is pretty sophisticated, and litany-structures ("knock knock") and riddles, all of which expand pupils' experience of language. But mainly we were having a laugh.
You could just ask the children to use joke books off the library shelves, or google 'jokes for kids' (the FOR KIDS is obviously very important), however I also gave out some sheets of clean jokes I'd downloaded off the internet. The children shared jokes they already knew, and some of them made up their own jokes and riddles on the spot.
I had some cheap notebooks that they used, but it's easy for children to make their own books if you have a long-arm stapler handy.