Hidden Wall Safe $4.99 at Bed Bath & Beyond stores It looks like an ordinary wall socket, but it's actually a mini wall safe. The compartment behind the socket is the perfect place to keep money, jewelry and other valuables. Easy to install. Measures 7 3/4" L x 3 1/2" W x 2 3/4" D. One-year limited warranty.
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cute idea. I would love to do this.