Need advice/ideas. LO isn't walking yet, but I need advice on how to block a hole at the top side of my stairwell. I plan on putting a gate at her bedroom door but also want to do the stairs in case she gets out somehow (reading the climbing thread has me nervous now).
I'm on mobile, so these may be sideways. It's literally a hole between the stairs and the rail on one side of my stairwell.

Re: Suggestions on baby proofing?
Thanks again for all the input everyone!