My daughter is 19 months and her hair is always in her face. She'll tolerate elastics (for a bit, til she notices them) but really hates clips for some reason. We use the little terry cloth elastics, I don't know where to buy more without buying a giant package that includes all those teeny elastic-elastics. Haha.
She likes to take the terry elastic out and chew it like gum. Ugh. I usually wait til we reach our destination to do her hair for that reason.