Step 1: What you need...
enough tile to at least cover electronics (we used a 6"x6" piece from Home Depot)
enough styrofoam as tile that is at least a little thicker than a 9V battery (we got it from A.I. Friedman)
twice as much posterboard as styrofoam (you need a oiece for the front and back)
one recording module (you can get them here )
!!! once you get all that cut the tile, styrofoam and posterboard to all the same size !!!