Thanks.
The worm farm is an awesome idea. So awesome that the school already has one in the vege garden
I like the beanbag idea. DS2's reading nook could certainly do with some bean bags and I found a shop on eBay that is selling their stock for next to nothing.
DS2's class doesn't have a reading nook. It has cousins for floor time but they don't have a lot of space so I'm still trying to think of something for them.