My hair is getting the streaks in it too - 55 here and I don't think it is so much about the hair telling our age as how we dress, how we carry ourselves, our setup, etc. Parents care more how competent we are so if you are slow to get up and hobble across the room they are less likely to go with you no matter what colour your hair. Your vibrancy should come out in what you tell the parents, what you show them about the kinds of things you do with the kids, your enthusiasm for doing daycare. How many years you have done it is like a built in reference and I think one of the reasons many who come with me don't bother contacting my references and rely on the fact parents for 28 years have been for the most part happy with my services that is good enough for them.

I have no plans to dye my hair as it goes grey but I do plan to keep it washed, permed, cut, etc. so that no matter what colour it is it looks like I care. I think that is more important to parents.