If you'd like to try playing a guitar that uses lasers for strings or drawing on a giant 3-D Etch-A-Sketch, now is your chance.  The Gizmodo Gallery is a temporary interactive museum in Manhattan (267 Elizabeth Street) that pays homage to the 80 coolest gadgets from today and years past.  The Gallery, open September 23-27,  is presented by the popular tech blog Gizmodo. In addition to a $3,500 pancake machine that whips out a flapjack in 14 seconds, you will find a one-of-a-kind model of the first Apple phone prototype,  man made lightning machines, and a 103-inch plasma screen TV on which you can play "The Beatles: Rock Band."  Oh yeah, and free pancakes. Get Gallery hours and more details at Gizmodo Gallery 2009.