I am currently looking for art class for my 3yo son, he loves to do art work, but it is really hard to find a non-instructional one (which I also preferred).
If you are lazy to prepare art materials by urself just like me :P it is also easy to find some not expensive art work in amazon or Joann store.
Mosaic and Suncatcher are some art that my son really like,
The Orb Factory Limited Sticky Mosaics Noah's Art
Kelly's Crafts Kidz Sparkle Suncatcher Activity Kit: Fun Animal 18-Pack (for $4.8 only)
another more expensive but more fancy version is Koala crate/ Kiwicrate
http://www.kiwicrate.com/ I am still searching for the art materials for my son to do in the thanksgiving and winter break :P
