Wren, I'd let her try it if she's interested in it. I wouldn't worry about future motivations - she's 8 years old, I think, isn't that right? My children and their passions/motivations/everything changed soooo so very much between 8 and the pre-teen to early teens. This might be a phase, or it might not, but there's really no way to know now, and jmo, the most important thing we can give our children when they are young is the chance to explore the things they are interested in and most importantly, to have fun.
Let us know how it goes!
polarbear