Bad Ideas Are Fun
goodenough.usCan't agree more, you could also call it brainstorming or shooting the breeze or standing around the cooler. Or even rubber ducking although thats more specific.
For that extra challenge, try coming up with ideas that you know won't make any money, profit or could be commercialised. Then your really being creative.
I like to think that getting the bad ideas out makes space for better ones. That's not always the case, and sometimes the so-called bad ideas can be more interesting than the good ones.