What are those things called that stop kids falling out of bed?

[CountessDracula]

DD going to stay with PILS next week and I need one.

a travel one

\link{http://www.google.co.uk/search?hl=en&q=travel+bed+rail&meta=\Bed rails or sides}

bedguards, tomy do a good one that soft...
we have one we leave it PILs

bed guard?

We have one that we used for DS that wasn't travel but folded flat and we just put it in the boot under the luggage. Will be shortly needing it for DD though.

bed guard maybe?

thanks!