The International Space Station is now in its prime and astronauts on-board are spending most of their time doing experiments of all sorts for scientists on the ground. There are some experiments that are possible only in the micro-gravity experienced on the space station. For example the Geoflow experiment will shed light on conditions deep inside Earth by recreating aspects of mantle flow.
Here astronaut and chemist Dr. Don Pettit does some physics demos that are out of this world.
Thin Film Physics
Fun with Antibubbles