Stream LeapFrog: Letter Factory Online Free – Watch Full Movie from Home at 123Movies. . LeapFrog characters spring to life in this engaging and educational video. A wild adventure to the Letter Factory with popular LeapFrog characters Leap, Lilly and Tad. Led by wacky Professor Quigley, Tad joins Js jumping on trampolines and Ks practicing karate kicks as new letters learn their sounds. Fun songs will have kids singing letter sounds in no time.