how old where you when you first work on a car

Grandpa Elmer Rife's Allis deck belt. Approximately 8... I can't remember the age for sure but I remember putting the belt on as he watched and criticized me from behind. It was a 1/3 twist between each pulley belt install. Then he boosted me up to check the oil, trans fluid, and coolant in his 455 Rocket Buick in the "car shed"...otherwise known as a garage. LOL