For only $15 you can have the plans to build this simple co-sleeper. Since it's built from common stick lumber the costs are fairly cheap and the size can be customized to your own bed height.
The Homemade Co-Sleeper we specialize in uses a full playard mattress. Also known as a Pack N Play Mattress. We recommend the Kolcraft Portable Crib Mattress
as it fits perfectly in our design.