At what age did your LO have their language explosion? And what did it look like? I keep thinking it will happen but it hasn't yet, I don't think! LO is 18.5 months old and has a ton of words (80-90 at last count) but he has been learning them gradually since about 11 months. And a lot of his words still sound the same (bah for ball, banana, book, etc). He will try to repeat most things I tell him, but can only make a similar sounds, not say the whole word. I guess I always thought of the language explosion as the point at which he would start learning like 5 new words a day and I would be able to understand everything!