In the USA there is technically no lower age limit to fly as long as you are with a Certified Flight Instructor (CFI). However, there are age restrictions for certain pilot certificates. Below is a...
Attributed to E. Hamilton Lee:Don't be a show-off. Never be too proud to turn back. There are old pilots and bold pilots, but no old, bold pilots.--- E. Hamilton Lee
In the UK, you can learn to fly an aircraft and do your Private Pilot License (PPL) as soon as you can reach the controls, BUT you cant start logging hours until your 14 years of age, You must also...