My son started collecting cards back in 2009 with the purchase of his very first pack of 2009 Topps. He was 9 years old.
This great Nelson Cruz card was in his first pack and it hooked him. He got it autographed at a game in 2010. He and I spent a fair amount of time buildling his collection from cards out of my collection. Quite a few of the "hits" I traded for ended up in a box in his room. He had a box for Cowboys cards, Texas Longhorn cards and Olympic cards. He had his 2009 set in a binder. He was having a good time with it and so was I.
Turn the clock forward three years. He's still a Rangers fan, but he doesn't have much interest in cards anymore. I-gadgets, my laptop, Minecraft and XBox 360 have taken over. He's in 7th grade now so I know girls are just around the corner.
It was fun while it lasted. I've taken some breaks from collecting over the years and always come back to it so it's possible he will too. I'll store his stuff with mine and he's going to end up with all of it anyway someday.
I just hope it means something to him when he gets it.