Step 1: The Box, Supplies and Tools...
So, first step was the box. I bought this one on sale from a craft store for $10. It's faux leather wrapped "3/8 particle board. Everything else came from the hardware store. I included 2 exterior outlets, but 1 would suffice for most people. So, if you only need 1, buy 1 of each thing instead of 2.
Box (size and material up to you) $10
Power Strip, 6 outlet $4
18 ga. lamp wire, 4' $1.20
2 Low profile gang boxes (used for securing the receptacles into) $3
2 110V wall receptacles, white $4
2 replacement lamp plugs $2
2 cover plates (I used brass ones for $2.50 ea, cheap white ones are $.50 ea) $5
1/4" peg board (I had a piece, but it is only a couple bucks) $0
Blue fabric (I had some, but it is very cheap) $0
Total Materials: $29 as shown, with white covers $25, single receptacle $19.40
Drill & Bits
Jigsaw or dremel
1/2" wood screws
Needle nose pliers / wire cutters