The Smart Play Yard Mattress Topper is a simple solution that proved itself to be quite useful in a variety of ways depending on your child’s age. Many parents dont realize that most portable cribs are not comfortable for babies and young children, which is why they often don’t get a good night sleep and, as a result, neither does the parent. After all, depending on what type of crib you have, chances are pretty good that your child is basically laying on a piece of cardboard with some padding that is being supported by metal bars. MamaDoo came up with a smart, simple solution. All you have to do is put it in the bottom of the crib and your child has their very own tempurpedic-like mattress. But, the play yard mattress isnt just for play yards. It can also be used by itself for tummy time with small infants, as a mobile changing station, for baby yoga and lots more. Really, the list of what one could use it for could go on and on. And, to make it even better, parents told us that this is perfect for travel and it comes with a plastic case to keep it clean when traveling.