It was verrrrrrrry easy to make and it continues to delight him to no end. This would be an awesome Christmas gift for that special someone (who just happens to be plagued by burglars...). Put the ingredients in the box with the directions which you can find here. Plus a promise to build it together and you'll have a memory-iffic experience. All this for less than 5 dollars, get your goods at Radio Shack.
Whether or not this device actually prevents burgling remains to be seen. We haven't been burgled in the 36 hours that we have had it, so it appears to be working.