Are you looking for something artistic to do? How about something that is relaxing as well?
This-is-sand lets you create sand art on your computer or other wireless device. It is a fun, relaxing activity for people of all ages.
This-is-sand can also be used to help kids learn to click and drag. In the settings (near the bottom of the home page) toggle off Auto-Flow. This will require you to click and drag to get the sand to flow. Students can work on clicking and dragging while moving the sand all across the screen.