Star Wars Mini Lightsaber Tech Lab: Master Yoda says: "Learn about light and optics, you will." Build a working mini lightsaber! Science fiction meets science fact! With this Star Wars Mini Lightsaber Tech Lab, you can build a real working mini version of Anakin Skywalker s lightsaber. Includes four colored crystals for various light effects, two lenses for optic experiments, and a fun and informative learning guide. Lightsaber is 8 1/4-inches long when fully assembled. Order yours today!