You Can't Teach an Old Frog New Tricks is the 144th level in Chip's Challenge Level Pack 3. It was famous for its unprecedented complexity and difficulty long from the very introduction of the level in Madhav Shanbhag's KeyboardWielder.dat: the solution requires an almost endless array of puzzles with often unusual, convoluted solutions that have to be set up such that a teeth can move through them without being killed, as it is required to fully solve many of them.