I have been enjoying a beautiful book, I Love Forest School by Martin Pace, owner and director of Reflections Nursery. It's full of pictures and detailed observations of children's explorations at Forest School and (a new idea to me) Beach School.
If your children don't have those opportunities, can you bring Forest School to them? Summer offers chances to collect the natural materials, be they seashells or pine cones, that enhance construction, craft or role play areas. Children and staff can help gather these resources, which then provide a springboard for discussion about where they were found, what kind of tree the pine cone grew on, or what kind of animal lived in the shell.
Even without trips to the woods, your setting can develop what Martin Pace calls 'lively connections' between indoors and out.
Hear more from Martin Pace and link to his book here.