Re: Suggestions wanted
If you're looking into what 7 year old boys dig, I can only shed light on what my 7 year old son likes...remote control cars/boats. Anything Skylander (Sony Playstation, Wii, X-Box 360). My son loves playing his video games!
We got him a fishing pole along with one of those Razor Electric Scooters...which he also loves!
Apple iPod Touch, iPad? I know these are pricey items..since you didn't give us a price range, I'm just telling ya what my kid has and uses?
I, like others have mentioned, would suggest a day of just he and you, whether it be fishing, zoo, working on the boat, whatever catches his fancy when he's with grandpa...he'd love! Breakfast at McDonald's (always a favorite when I hung out with grandpa...back in the day).
Good Luck and Wish him a happy birthday from all the weirdos on iBoats!
~Brett