$55,000 Life-Sized Dinosaur
If all your child keeps asking for is a pony count yourself lucky, because they could be after one of these. Although this "pet" won't need any food or exercise, it will need just as much room (if not more!). It's a life-sized replica of a Camarasaurus dinosaur, and although it's not really intended as a toy I'm not sure what you would use if for, unless you're building a theme park or something. Handmade of fiberglass and resin, it stands 18+ feet tall and will be quite the conversation piece wherever you put it. But life-sized dinos don't come cheap, and this one will cost you £27,999.99 (about $55,000).