Parish Episcopal in North Dallas (75244) has quite a few different summer camps for that age range related to robotics. There are several using LEGO Mindstorms EV3 and other engineering/programming classes.
Main website at
http://www.parishepiscopal.org/page.cfm?p=1474
Catalog of classes at
http://www.parishepiscopal.org/uploa...Summer2015.pdf
Let me know if you have any questions. Full disclosure: I'm a high school teacher there but not affiliated with the summer programs.