If you want a Transformers toy, you can find one at your local toy store for not too much money. ALternately, you can buy this insane Homage toy for $2,000 and have it custom built for you in about 3-4 weeks.
This "toy" turns from a humanoid robot into a plane of some sort, and it looks like it's got a couple of knives on board as well. Nothing says fun for the kids like a $2,000 toy with knives! Who needs plastic toys anyways?