You can't actually buy it yet. But you can contribute to its development via Kickstarter. Acquaintance level donation at $5 will give you email updates when Carrot grows. Friend level at $20 and you'll get a Carrot seed. Baby Carrot level at $50 will get you a spot in the first harvest once development is completed in 3 to 33 months.

Looks like there's a pre-order campaign. Probably will ship early 2016 once they wash out all the... bugs.... :-D

Available immediately in most of the (farmers') markets near you.

just come to my kitchen garden.