Y is for youthful

Youthful - you always see the world as if it is the first time you experience it.
youthful |ˈyoōθfəl|
adjective
young or seeming young
: people aspiring to remain youthful.
typical or characteristic of young people : youthful enthusiasm.

Cartwheel of Life

So there you are, cartwheeling your way through life, and if I’m lucky, then I’ll be there with you.