Hello everyone. My daughter has a fever, but she doesn't say anything …

Hello everyone. My daughter has a fever, but she doesn't say anything about being sick or anything like that. The son started coughing, I don't know if he got it from her or not, he's acting up, his nose is sticking out and you can call him a runny nose. What else can be given? It turns out tomorrow is a holiday ??‍♀️ Should I apply more often to the chest? And could there be something with the teeth?