Here is the Thinking Cap that I designed for my children.  Here on Devan it is worn inside out.  This is how the Thinking Cap came about.

The idea came about when my son Blake wanted a plain black knitted hat for Christmas, which is the knitters equivalent of Chinese Water Torture being both interminable and ineffably boring to make.  So I made a plain black cap on the outside and then knit a lining with every wild color and pattern imaginable.  Hence the Thinking Cap.  The outside of your head may appear to be calm and collected, but the inside is teeming with color, pattern and wild contradiction.

Devan saw her brother's hat and wanted one of her own.  Her outside is plain soft green hand dyed cashmere, her inside can be seen above.  She also wanted her secret identity knitted into the band of hers and so you can glimpse the words Russian Spy.