(MNN) - The first private spacecraft ever to launch toward the International Space Station will be carrying a host of student science experiments when it blasts off on May 19, including projects looking at spiders in space and how microgravity affects wine. SpaceX's robotic Dragon capsule is slated to lift off early Saturday from Florida's Cape Canaveral Air Force Station. The flight is a demonstration mission, to see if Dragon and SpaceX's Falcon 9 rocket are ready to begin a series of 12 contracted supply runs to the orbiting lab for NASA.