Gather your supplies:
An old pack n play with a mobile bar (changing table optional)
A pair of scissors
A fitted crib sheet
I cut the mesh siding out of one side of the pack n play. Making sure not to cut any of the supportive fabric (the green on mine). Then I put on the mobile bar. And since mine came with a "changing table" piece, I figured I'd put that in too so my daughter could have some place to store her things when she's done reading and wants to cuddle up for a bit.
A few notes about this project.
1. The mesh is a surprisingly supportive piece of fabric for the pack n play. There is little support under the open side now. With 2 kids climbing in and out, I'm not so sure how long it will hold up. I'll try to update this in a few months and let you all know.
2. My 2 year old thinks this is his personal jungle gym now. The changing table piece is not safe for any little climbing monkeys you may have in your house. He also loves to hang from the top rail of the open side and swing. It's not a problem when he does it, but when my 4 year old joins in, it does tip over.