The Nature Conservancy offers several virtual field trips that allows you to do everything from exploring a coastal rainforest while in a canoe to unlocking the secrets of coral reefs in the Dominican Republic.
Aminah's World is a website presented by the Columbus Museum of Art. Here you can choose a digital background then build a collage by layering kente cloth and other fabric scraps, found objects, shells, and yarn. Objects can be moved and re-sized, and the result printed out.