Found on Amazon.

[Baby Toni38]

This bed rail system is great for those that what the feal of sleeping in a Crib but don't want or have the room for a dedicated pice of furniture. I love mine.

[Crinklz Kat]

I've been looking at getting some of those for a while.  Not necessarily to emulate a crib, but as a means to keep my plushies on the bed.  That would allow me to pile more on so I'm literally sleeping in/under a mound of plush! 🥰

[Cute_Kitten]

That is cute! And much more convenient than having an actual adult-sized crib! (but an actual crib is awesome too).  This is a very nice alternative. Turn an adult bed into a big baby bed and back again! 👍