Book Pond!
 

:frog: Just read a great idea on turning an empty space of your room into a 'Book Pond'

:clownfish Blow up a large paddling pool and throw in a few green cushions that will be lily pads!

:goldfish: In a shallow tray have a few books for the children to pick up and read at will!

:tropicalf To try and control the number opf children that try to get in before the novelty wears off - make some simple head bands with circles on for frog eyes. Number them 1 - 4 (or less/more depending on your pond size!)
Only allow children with a band on to enter the pond - alternate frequently so that everyone has a turn!