my youngest climbs EVERYTHING! she's been attempting the gates but doesn't quite understand the need to go "up" versus over, so thankfully she's still trapped. she is not above using things as step stools, is very coordinated, and can easily go up and over plastic bins I was using to block her into a room (or block the dog out).
my oldest never really climbed so this is totally new territory. I'm hoping she's not as accident prone as my oldest!!