My almost 4 year old granddaughter was here last week, she helped me put timing belts on a goldwing and she visited while we were building a funnycar chassis. She went home and told her parents she needs a hammer, and some tools, clean tools, and white shop towels and a garage. When asked why, she said so Papa can come over and help her build things.
Brought a tear to an old mans eye, her mother asked for tools at that age too. she still has them.