|Photo from Pinterest|
But, thanks to my mom's genius idea, we found a solution! Rather than having the pool noodle directly on the slippery plastic mattress cover, we laid down shelf liner on top of the mattress cover and below the pool noodle.
It now stays in place and doesn't move almost at all. I think a slightly bigger pool noodle may be a slightly more effective as my son moves a whole lot, but the only time he's actually gone over the noodle was when he was already halfway over it when he fell asleep. I'd say this is definitely a good way to be thrifty, keep your kiddo safe and not spend a bunch of money that would make changing the sheets and remaking the bed a bit more challenging. I like this idea, a lot. And, it appears that my son does as well.