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Through the combination of whistles, drawing cards and masks, 1. Let children make interesting whistles when blowing with a big mouth, and also exercise vital capacity in the process of blowing. 2. There is a card slot in the front so that children's own paintings can be put in, creating a sense of participation and interesting design. 3. It can be used for many times after disinfection to reduce the shortage of masks during the epidemic. In this way, children feel that wearing masks is a very fun and cool thing. It can solve the problem that children don't want to wear masks skillfully and avoid all kinds of family quarrels.