These are the £10 (~$16) silicon dinosaur mini cake molds available from Lakeland. Each two-sided set bakes two brontosaurus, two t-rex and two stegosaurus. What you do with them after that is your own business. Unless your business involves mashing dinosaur shaped mini cakes up your keister, in which case I'm afraid I'm going to need to hear about it in detail.
Keep going for a shot of the actual molds.
Thanks to lilco, who agrees Willy Wonka DinaSour Eggs were the tits and they need to bring them back already.