(Image credit: Apartment Therapy )

You never know what you are going to find when you visit the shop at Chicago's Museum of Contemporary Art. We found these delightful water color blocks and couldn't stop playing with them.

Each set, $27, has six wooden pieces (three blocks and three semi-circles) that are filled with a colored liquid. Mesmerizing to be sure, so make sure you let your children play with them a while as well.