A Red Ryder BB gun. My 1st 'real' gun, given to me in 1956, was my dad's Remington (Browning patent) .22 break-down rifle that feeds thru a slot in the right side of the stock. I passed it down to my son back in 1981.
They might have a boy in a few months so I can see it being passed again in about 2017 +/-.