Kids are a fountain of joy: Rod Stewart

London: Singer Rod Stewart says his children are his `fountain of youth` and help to keep him feeling young and healthy.

The 68-year-old `Maggie May` rocker has eight children with his youngest kids being Alastair, seven, and two-year-old Aiden, with his third wife Penny Lancaster, reported Contactmusic.

"Alastair comes home from school and says, `Dad, let`s go!` I have a stretch and go play. If there`s a fountain of youth, its children," Stewart said.

Stewart is also father to Sarah Streeter, Kimberley, Ruby, Renee, Sean and Liam, his children from previous relationships.