Main Good Idea
Interesting.. Bringing portraits to life.
If you have some free time on your hands, here you go -- some neat tricks on smartphone photography. The idea with a card board made tripod and headphones is neat.
Keyless Entry Using Your Phone:
Something that you see and remember.
Home made wine cellar:
Make sure the mounting brakets and ceiling can support what you are storing, otherwise you'll need some bodywork done on your car.