Uphill

I hooked up the Burley to my bike this morning and hauled the kids to a playground a mile or two from the house.  It was about 173-degrees out, but I'm badass.

Here's Rowan swinging.  You can print the photos and make your own flip book.

It was uphill the entire way home.  Really it was uphill both ways, but it was definitely uphill on the way home.

How can I fashion a peddling mechanism in the Burley so the kids can contribute?