Nobody mentioned the Dixon tunable ~ that’s a nice whistle that my sons liked a lot.
There are a lot of good tunebook suggestions, but you could download a tunebook at Ceola’s and then put it together in a nice binder that he could add to later. Just an idea.
Mary
No one has said it yet, but, you can download almost ANY music you could possible want. Much of it arranged in tune books in pdf format. They print out VERY nicely too. I have a couple around here I punched holes in and put in binders.
And then I spend the money I would have spent on books…on whistles…
The thing is, random collections of random versions of tunes is a heck of a lot less useful than a good book of tunes.
And there are a lot of good tunes which are not readily available on line – for instance, as far as I can tell, JC’s Tune Finder doesn’t have any Newfoundland tunes in it at all. And you won’t get much in the way of context for the tune, nor good recordings.
Frankly, the more I get into the music, the less I use the Internet to get sheet music. It’s a great tool for finding out more about tunes, but not so great at teaching them.
Yes, we have been doing that, he has a stuffed binder full of music that we’ve downloaded or obtained from someone else. But, lately he has been coming up with tunes that I just can’t find anywhere. (He’s a collector, I think that’s partially why he likes this type of music so much.) Where are some good sources for getting sheet music online?
BTW, I let him look at some whistles online, he really was taken with how the Alba whistles looked.
it’s not what you think cran…i hope.
Alba whistles are great! I have 3 of them. My favorite is the Q1. It is a very easy whistle to play. There are some reviews on Alba whistles. Do a search at the top of the page for the Q1 reviews. Also Stacey does some really kool fipple art. As you can see by my Avatar. It is an Alba Low D with a smiley face and shades. I added the milk mustache for a contest. By the way, the whistle’s name is Chiffy. 
Cheers,
Kathy 
Can you list some of those tunes you can’t find? It might help give us an idea what he is interested in.