This month marks the 250th anniversary of one of the most famous science experiments ever: Benjamin Franklin's kite and key experiment, which he conducted in Philadelphia in June 1752.

Even before he flew that celebrated kite - and by the way, the original kite and key have not survived - Franklin was already well-known for his studies of electricity. The year before, in 1751, he had published a pamphlet entitled Experiments and Observations on Electricity, Made at Philadelphia in America, for which he received international acclaim. With his experiments, he coined many of the terms still used today such as battery, conductor, and discharge.

This Saturday, June 15, from noon to 3pm, The Franklin Institute will celebrate Franklin and his kite and key experiment with a slew of fun and educational activities, including an indoor, ultra-light, kite-flying demonstration and a spectacular thunderstorm show. You can even take home a complimentary Franklin Institute kite commemorating the day's events.