Here is my 3 year old getting ready for the great escape. We call him Houdini because he can escape from anywhere. Whenever I don't hear him I go into his room and this is what he is doing. If I didn't come right away (for instance if I ever wanted to use the bathroom) he would have the window unlocked, the screen pushed out, and he would be gone. We have tried everything, even jamming the lock, but he just pushed the window up until the lock broke off. In our new house I am going to put bars on the upstairs windows, and now you know why. I wonder what he'll try next?