Hey Amy,
It's called the Bikerdog and it is awesome! I've never had her wreck me or anything! It's virtually impossible for her to pull me over with this product. It costed me $55 (s&h included), but it is worth every penny!
I bet Nebo would just love it! I've tried rollerblading with her, but it's just not the same, with the bike she can go so much faster!
Anyways, on the website they have videos that show how it work & everything. If you have any more questions, let me know