We have them and enjoy the curriculum too.  The fact that we're getting art done with a 4, 5, and 6 week old baby ought to speak for itself. 

Sarah working on a close range still life 

Holly and Abby working on filling the space on their paper

Holly's effort

Abby's work - love how she understood the concept of sky peeking through between the leaves

Hannah was working on shadows and shading in the woods.