I have a really wiggly kid who would sleep crawl and we bought this (SURPCOS Bed Rails for Toddlers -New Upgraded Extra Long Bed Guardrail for Kids Great Fit for Twin, Double, Full-Size Queen & King Mattress (60 x 30 Inch, Grey) https://www.amazon.com/dp/B07R6PQDHJ/ref=cm_sw_r_cp_api_i_RCneFbH95SPF8). I felt sorta stupid spending that kind of money to basically turn our bed into a queen size pack and play, but the peace of mind it bought me was awesome. We used it from the time our son was 6ish months until he was 17 months or so, and could climb down from our bed. He is a really active kid, so sometimes it was nice to just lay in there with him for a chunk of time to be able to chill out in a nice, safely contained environment, especially once he began walking. It gave him a really nice “yes” space to play in. We loved it. It’s a bit of a nuisance to have something like this on your bed but the sides do slide completely down so we could leave them down to get in and out of and just put it up after we got into bed.