Just come across these on ebay whilst looking for stocking fillers for the kids. It grows to six times it's original size just by placing it in water - ideal to do with the kids and watch it grow over 3 days.
States a brilliant gift for the animal lover that can't have the real thing and requires no excersize, grooming or feeding!
Shrinks back down to the original size after it's been out of water for a few days as it dries back out.
Same seller is also selling a pony version and you can get an extra 10% off when buying 3 items in a range