How do you know the children were excited by the fair

You can tell the children were excited because they went to bed early and dreamed of the fair. When they woke up in the morning, they excitedly dressed in their best clothes.

The night before the County Fair, everybody went to bed early. Fern and Avery were in bed by eight. Avery lay dreaming that the
Ferris wheel had stopped and that he was in the top car. Fern lay dreaming that she was getting sick in the swings.