The first thing that comes to mind for me is to talk about our databases. Teen patrons are usually happy to see that there is another way to use their library other than trying to get that ONE book that is relevant to their research subject!
When I did my Technology Garden idea, the first thing I wanted to ensure was that I offered something for every discipline. So I looked for apps and sites that would offer up a real choice. I ended up with some math-related things like the TanZen Lite app and the KhanAcademy.org site (also good for some science), and I covered science with the iPad app Science360, Exploratorium.edu, and Geo-cube.eu. All of the apps and sites were educational, but I rounded things out with Tagxedo.com (pulls webpages and does Internet searches by topic to populate a word cloud), Storybird.com, PicLits.com, the Timbuktu iPad magazine app, and the Sgraffito scratch-art app, with Mad Libs thrown in, just for fun.
We have started incorporating STEM by offering some special events programming in cooperation with museums. While that may not be an option for everyone, I budgeted funds to have the Houston Museum of Natural Science visit with their dome and Earth Science on Wheels programs during this year's summer reading programs.
For Teen Tech Week, I am doing an activity scavenger hunt. One of the activities is creating a podcast.