I'm using cheap acrylic paint like the ones you see below. They cost around $8.00 before the use of the wonderful 40% off coupon. I only have 18 colors but I wish I had the ones below - 24 - with the 'glow' colors. Imagine how much more fun that would be to experiment with.
There are many advantages of painting in a small book. If someone asks you 'what are you doing right now?' you can say 'well I'm an artist and right now I'm working on a book.' Then you can just 'whip out the book and let them take a look!' If they see something they like - whip out your exacto knife . . . cut it out . . . get paid . . . and buy yourself a medium ham, pineapple and jalapeno pepper pizza and a cold beverage. It's a win-win situation! So go out and buy yourself some cheap paints and have some fun. Peace.