Any of you out there that could give me some much needed guidance would be appreciated. Bob, I haven't tried the 10-holers yet, and I've just been tuning by ear, but I find the larger the instrument, the harder it is to get the high notes in tune. Also, the higher notes sound too breathy to me and it gets worse with a larger ocarina. Cindy BTW, I did make some with little regard for tuning. Tuning takes time, and shop-owners say the kids don't know whether its in tune or not, so please make some cheaper whistles.
Whistles are no problem and making noise for kids is no problem.
I am trying to make an accurate instrument that you can actually play music on. So far I have had good luck, but the last 2-3 notes are a mystery to me. There has to be an answer somewhere. I'm sure there is a law of physics of vibrating air columnes that applies here. I can get 7 notes right on scale, but 8,9 and 10 are a loss.