We learned that we should come up to the box and block the hole. Because birds can fly out and we can get hurt. We also learned don't always use the same path because you'll leave a trail for predators. It is also important to stay quiet so we don't disturb the bluebirds. This is their home not ours. Also, always knock gently on the door before you open it.
We'll check back after spring break. Keep your fingers crossed there are eggs when we get back.