Brian Reed created some cool flow analysis simulations for the Baby Bug and the board that deflects the air upward. On the glider simulation, the vortices at the tips—caused by higher pressure air under the wing moving to the lower pressure on top of the wing-- really stand out. More of Brian's simulations here.
For several years Dr. Jérõme Noir has been reinforcing theory in his Fluid Dynamics course with hands-on activities, including walkalong gliders. He and his students at the ETH Zurich University Institut fur Geophysik in Switzerland made a really fun, silly video of their flying. More about walkalong gliders here.