Traveling a small watercolour set and a good brush opens the opportunity to work just about anywhere.  In September I was the presenter for three days at the "Master Artist in the Library" event here in town.  Armed with a small bag of pebbles, and my trusty 12 colour watercolour set,
I painted these little guys

Each is about 3" x 5", on  5" x 7" precut watercolour paper.  I tend to travel with sheets rather than blocks if I am painting inside.  The blocks are great when painting outdoors, the wind does not catch at the sheets and I find the paper dries out more quickly outside, so there is more wetting needed.

I generally don't use resist, relying instead on marking key points in a very lightly wash before defining shapes more heavily.  I like how this lets the compositions enfold and breathe rather than being tightly drawn beforehand with pencil.