Sun Screen for Little Towheads

You’ve all seen pictures of my little Becca.  She is as fair as they get.  And unfortunately, she is as stubborn as they get.  And she refuses to wear a hat.  And she is outside.  A lot.  The area of her scalp where her hair parts gets quite red.

And to make matters worse, next week, we are taking our annual family trip to the beach, and I want to protect her head from the dangerous UV rays.  Is there a product I can buy that will protect her scalp? 

Sometimes I use the spray-in sunscreen on the top of her head, but I don’t know if it goes through her hair to her scalp, and I also don’t know if it’s very good for her hair.  I have this reoccurring nightmare that it will cause all her gorgeous blond hair to fall out, and she will be bald for her second birthday.

So is there such a product?  If not, I should invent one.  I bet I’d be an instant millionaire!