What fish? Some sort of Salvelinus species?
Sadly if you can't use a iPhone to do it over here then forget it.
An iphone a seat and a wifi connection here is about all some kids care for over here,
Look like North American Brook Trout to me. A member of the Char family.
"He who kills sow with piglets empties the forest of boar" My neighbours dad on new years eve 2011.
It has to be worth spending the time following outdoor pursuits with your lads just to see the smiles on their faces!
As Klenchblaize says "Priceless"!