I have been teaching Xena to take off her shoes herself. She can take the velcro straps off but has difficulty removing her shoes. So I taught her to say "Please help." after she had removed the straps. She soon caught on the significance of this magic phrase and the doors it can open, sometimes literally. At first she used to say what sounded like "Pizza hut" but now she says it more clearly. It's nice to see her use "Please help." in other relevant scenarios, like when trying to open a door, pull off her socks, get down from her high chair, etc. In this video, unable to open the tightly-closed play-doh containers, she decides to stack them instead, but eventually says, "Please help."