Ben's new trick

Some mornings Hailey would get Ben out of his crib so he could play with her and Jacob. Then one morning I asked Hay did you get Ben up this morning and she said No. So I thought oh no he's climbing out of his crib. At this point I was hoping it was still a fluke then Hay was still sleeping and Ryan brought me Ben in our room and said look who I found wandering down the Hallway. So I put him in his crib to see what he would do and this is what happened. He's barely 18 months old. Doesn't he know he's my last baby so he needs to stay little?