At one point I was dreading the remote control instruction session for a well educated, wealthy, older, proudly anti technology fellow. I was using Pronto at the time. This was about to be a very frustrating lesson because he was so eager to prove that technology was impossible to deal with. However, a few minutes before the session was to begin, salvation walked in, -- in the form of a very sharp 12 year old granddaughter. Seizing the opportunity, I spent a couple minutes showing her how the remote worked, told her that she should teach him, then I left. Everybody won. She was proud, he was proud, and I was gone.  It was a very successful installation.