This is my son, trying to get someones attention on the other side of the door. This door opens to the bathroom. When he feels he should be in the room with you, but for what ever reason the other person does not a 1 year old in this private area, he feels he should stick his fingers under the door for you to see.
When you are on the inside, you know he's there. His stealth skills still have to be mastered, but all you see are the tops of two little fingers trying to grab onto anything under the door. Its funny when the person on the inside does touch his fingers, the laughter starts (on both sides of the door).