I wouldn't be surprised if the parents who throw away money on a cake smash like this are not the ones who do messy play with their kids in their own kitchens and gardens, with paint and glue and play dough. That's why they find it so amazingly cute. Does the price include paying for someone else to clear up the mess? Bet they don't have it in their own houses, actually.
Oh well, if you've got £800 to throw away...
... no, it's still a bit of a sick idea, I think.
luckyg, if it's any consolation, I wouldn't call green sugar goo like that food.