what would be the best warmup or exersice for begginer. i got a kid whos interested and hes been playin for like 2 years and its hrd for him to hit the high notes. for me it just came naturally. does anyone have a good exercise that trains your lips fro the high notes? also when i make a typing error i cant fix it. i cant seewhere i am when typing. to fix a problem ill need to backspace. can somone tell me how to fix this problem?