Lowe's is currently accepting signups for their How To Train Your Dragon 2 "build and grow" clinic. It is Saturday, June 14th at 10AM. You do need to sign up now to make sure there are enough materials. Also make sure to check the zipcode availability. Sign up here: http://www.lowesbuildandgrow.com/pages/default.aspx
A full schedule of future projects at Lowe's can also be seen there if you click on "Full Schedule". Many stores do these during the summer or at holidays. Michael's craft store frequently has art projects available, so if you live near one you should check their schedule too.