DD is 9 months old. She started solids at 6 months. For the last 2-3 weeks she has started this thing where she'll open her mouth wanting food, we put it in and then she blows it everywhere. Most often it starts halfway or towards the end of her meal. I don't know if I should ignore it, or try to firmly say no. Also, sometimes I think it's her way of saying she doesn't want anymore, but sometimes she does it from the start of the meal. The funny thing is that she'll keep opening her mouth like she's wants food. She thinks it's funny. Any advice on how to respond to this behavior?