One of the coolest things you can do right now with Lego is to submit concepts to the Lego Ideas project.
If you get 10,000 people to vote for your submission then it gets reviewed by Lego.
If Lego approves the concept then Lego produces it for retail. You get some money. And millions of people have an option to build your design.
Here are our current favorite active Lego Idea sets: