There’s one more week in this summer’s free, online Maker Camp, sponsored by Google+ and Make: magazine.   Teens build daily projects at home or with friends, share them on Google+, and then join daily Google+ hangouts to learn project tips and tricks and go on virtual field trips on Fridays.  This week’s projects are all about do-it-yourself music, and this weekend’s project is an LED Color Organ.  Next week’s projects focus on special effects in movies.  Join Maker Camp to particpate for one or more days.  Videos of all Google+ hangouts, as well as instructions for all previous projects, are available online.