How do you find a secret passage in your house?

First of all, you might want to ask your parents or who built the house. It is called a SECRET passageway for a reason though, so they WILL PROBABLY say no or give you a sly grin. That most likely means yes, so then you go around tapping on walls and looking for hidden springs or buttons. Try to get someone to let you look at the blueprints too. If there is a suspicious spot, tap on walls and floors. You never know what kind of secrets a person keeps, so keep your eyes open...