I just bought a Kala KA-15S for my 5 year old daughter. My original idea was to tune it to mandolin tuning (GDAE) since I can play the mandolin and have a couple nice instruments, but the nylon strings would be easier on her fingers. (I also ordered the Aquila 5ths string set) Then I got to thinking that I might just learn the ukulele and teach her to play it in standard tuning. She'll actually probably end up playing guitar when she gets older, so I'm not sure spending the time on mandolin would be the best application. The thinking here is that maybe she would really like playing the ukulele and could start building on that right away. THEN someone suggested open tuning (GCEG) since she is so young. I'm only apprehensive about this because I don't want her to get interested and then have to re-learn the whole thing if she wants to really go forward with her playing. I asked the mandolin forum the same question, but I really want the opinion of people who actually play this instrument. What are your thoughts? Mandolin tuning? Standard Tuning? Open tuning?