Good old Freecycle, the photo on the left is the one used to advertise the Pebble Pool Fountain Kits on Freecycle. The other photos are off the internet showing how they work. I was lucky enough to be the first person to request these and went to pick them up this afternoon.
I'm going to spoil my Toads, Frogs & Bees on the allotment by installing a pebble pool fountain for the bees on the plot. I already have one solar panel pump and I'm thinking about a solar floating pump for the other, but have already been warned the foxes have been known to play and take floating fountains, plus froglets can be sucked up the water inlet hole!