While visiting my brother, his wife and their son, we discovered what might be the best toy ever!!! Snap Circuits...
My nephew has the Jr. set and one of the other base models. My husband and I spent hours with Jeffrey playing with the thing. Basically, you snap together pieces and build electronic devices like radios, lights, buzzers, etc. Even after Jeffrey went to bed, Ben and I kept playing with it.
Buy it for the kids in your family. Maybe one of them will be the next Steve Jobs and put you in a nice retirement home.