Piet Mondrian for Kids (Crafts for Lazy Parents)

One of the first artists' styles I remember recognizing is Piet Mondrian's. Even though Mondrian started off as an impressionist in late 19th century Amsterdam, years in Paris and his own spiritual quest led him to develop Neoplasticism. I don't remember that word, nor do I remember another description of Mondrian's later paintings: geometric abstraction.

But the black lines, rectangles and primary colors?

Those I've remembered for more than 30 years.

How could primary colors and simple black lines NOT appeal to a kid who liked art but felt she had no artistic ability?