You can develop your child's fine motor skills by allowing him/her to play with glue. One of our favorite art activities is making pictures with colored glue. I bought the glue on sale during school supply season. The Target glue bottles cost me thirteen cents each. To color the glue, you add food coloring and shake the bottle. It's a quick, easy, and cheap project. I am sure that your kids will love it as much as my kids.
You can easily turn this activity into a learning activity by having your child write words, practice coloring in the lines, mixing colors, etc.