I just received some colorful tiny mini-breadboards from FunGizmos.com. They are pretty great. Now quickie ideas prototyped with Arduino can be even smaller than the “1¢ Arduino under-shield”.
They appear to be the same quality as the other breadboards I have, just different color plastic. I can already tell the colors will help me differentiate projects, which all tend to look alike from 10 feet away. Normally when you buy these from Digikey or similar places, these little ones cost $7 a piece. FunGizmos has them for $5.40. And that’s cheap enough to get a few. Note that all these tiny breadboards don’t have the side power busses like the larger breadboards do. That’s the price you pay for tininess.