7. Under the Sink
HIDING spots!! Lots of good examples---Potted Plant Secret Compartment
The 12 Best Hiding Spots For Your Valuables http://www.wimp.com/12-clever-secret-hiding-spots-for-valuables/
False-Bottom Drawer Hideaway More
furniture with secret hiding spots | Picture Frame with secret stash compartment by AislingH
15 Secret Hiding Places That Will Fool Even the Smartest Burglar - Page 13 of 15 - DIY & Crafts
This geocache is very clever! Just make sure you own the wall, or have permission from the owner.
Looking for a good hiding spot at home? Make your own multi-book secret storage compartment using old books.
Narnia theme...although how cool of a hiding spot would this be!? (or if you did it in the parent's bedroom...a spot to go for some privacy!)