Someone else suggested clear eyebrow gel but I've never used it. I did think though, why not clear mascara? It would probably hold the hairs back (it's gel like) and I would think be safe to use around their eyes.
This eyebrow gel says it doubles as clear mascara and can be used on flyaway bangs.
Buy KLS Beauty Eyebrow Gel For Brows, Clear As Ice Online at Beauty.com