@croydon - I think gender bias can be an issue here, as boys are often given the impression that art is something that only girls do. If your child has picked that up you might want to give them a crash course on art and show them that there are many famous male artists and that art can be about a lot more than just coloring or drawing ponies (this will appeal to those girls who don't like those activities either!).
I would suggest showing them some of the things that Leonardo Da Vinci worked on during his lifetime. He had such a wide variety of interests, including flying machines, anatomy, painting, sculpting and so forth, there are sure to be some easy arts and crafts activities that will link in with what he did.
A child who might not be interested in colored pencils or making painted butterflies could be much more intrigued with the idea of building their own flying machine.