What we had to do for [Sarah] might still be possible with the Plum’s crib:
We took the springs out, kinda dismantled the bed. Put the MATTRESS on the FLOOR, INSIDE THE FRAME of your bed! Then lowered the side to the top of the mattress—so it added the height of the mattress to the height of the side, thus making it harder for you to pole vault out. plus when you did (as you inevitably did) you started from a lower spot.
Yup, we ended up doing exactly that, because Elliot started being a climber. It's working really well.