All signage at Children's Discovery Museum is in three languages: English, Spanish, and Vietnamese. When I designed the graphics for Rainbow Market, I used fruit and vegetable skins as textures for the color signs. The textures add interest to the color fields without specifiying which ingredient belongs where. This eases restocking. For example, if we are out of green peppers for the green bin, we can use broccoli instead and the signage still works. Photo courtesy of Children's Discovery Museum of San Jose.