I bought Heinz 牙仔餅 for Nicole yesterday. It says the biscuits can be given to baby from 6 months.
Nicole likes to hold it and put it in her mouth. (but she will put anything to her mouth anyway). But because it is hard, she cannot finish it in one go. Both ends are very wet after Nicole sucks it. I will dry it out and put it in a box and put in the fridge for next time use.