Are you working with kids in a camp or school this summer? Will there be a chance that you might need a substitute to fill in for you at some point? Check out this blog post from Crafting Chicks to get some ideas for a fun sub-activity, just in case! Summer Scavenger Hunt - Free Printable Game
If you need some "in your seat" kind of fun activities for early finishers or to help a sub, check out my printable art worksheets. They're creative and fun to do.
Create a Lego Character in Disguise