It's the most aggravating response to a question EVER. What do you want for dinner? "I don't know. What do you want?".... or worse, "It doesn't matter". THIS may solve that dilemma once and for all. Of course, you'll need to localize it and pick the places you like best. And somehow explain to your child that Mommy and Daddy need your toy.
I don't know if this guy came up with the idea or if it's be shared a zillion times by different people... but I'm sooooooo ready to try this.