Answer:
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
What type of house weighs the least?
I go inside boots and outside shoes.
Send poorly behaved children to me and let them sit here.
I am rarely touched but often held. If you are smart you'll use me well. What am I?