It certainly does sound as if you have some talented sons at your house! At three years of age, your preschooler has advanced fine motor and visual skills if he is coloring so carefully. He also has advanced short-term memory and visual/spatial skills if he can complete difficult jigsaw puzzles unassisted. However, at this young age, the best recommendation I can make is to let him do more of this! Putting him in a formal art program, especially one with older kids, may prove frustrating to him. Even though he is advanced, he is still three years old and he may not be interested in sticking to task all of the time. Frustration could negatively effect his natural interest in art.

Continue to provide him with lots of time to play with art materials, puzzles, and building toys. You can even make jigsaw puzzles yourself by gluing interesting photos or pictures on cardboard and cutting them up. Take art materials along to a places your sons have already visited a lot (like Grandma's house, or a shopping mall) and encourage the kids to draw something interesting. These are goods way to keep their artistic interests alive.

By kindergarten age, your son may be ready for a local art program. However, unless you have located a private art teacher, a group program may not be sufficiently advanced for your sons. You stated that your older son has been identified for the gifted program. A recent study showed that most siblings test within 10 IQ points of each other, so it is likely that your little one may have some gifted talents as well. I would like to suggest the following book: Your Gifted Child: How to Recognize and Develop the Special Talents in Your Child from Birth to Age Seven by Joan Smutny.