This crib has two heights, and also converts into a bed. I added an extra board to the side for the transition too, it's open, but your child can't roll out of bed. In excellent condition, super easy to convert, and store. It's served us very well! Intructions and allen key included.
There is a mattress too which you're free to take. No lie, it's got some miles on it. But it's there if you want it.
https://www.ikea.com/ca/en/catalog/products/80248525/