My daughter got an art easel for Christmas, so I bought her some Crayola washable paint to go along with it. She is only 2.5 years old, so holding a palette isn't about to happen, nor was filling up a bunch of little bowls that I would have to wash later.
Then I realized I had an ice cube tray sitting in the back of a kitchen shelf collecting dust. Each little pocket holds a dolop of paint, there are enough pockets for each color and the size of the tray fits perfectly in the easel shelf. It was so easy for her to dip her paint brush and these paints did not drip. It is perfect … I didn't spend any more money and I have a little more space in my Tupperware cabinet!
Related: Modified paper cups as paint holders