Who needs a supercomputer to do molecular dynamics? Thanks to Theodore Gray's new "Molecules App" for iPad/iPhone, you can now do molecular dynamics literally with the touch of a finger. "Molecules" by Theodore Gray is the interactive version of his beautifully illustrated book on the properties of the molecules that make up our world. Integrated into "Molecules" is the molecular dynamics code NAMD, which makes it possible to run real-time interactive simulations of the molecules in the book. You can pull, stretch, and twist hundreds of different molecules, or even tie them in knots! By playing with the interactive molecular dynamics simulations, readers can get an intuitive feel for the properties of molecules - not to mention, they are just plain fun to play with. The "Molecules App" is already very popular, and has been chosen for the Editors' Choice list on the App Store. You can see the app for yourself in the iTunes App Store, read more about the creation of the app on Theodore Gray's blog, and see a screencast of honorary group member Sebastian (pictured here) playing with NAMD through the app on the 500 atom molecule maitotoxin.