We have pollinator gardens both in our big garden by the library and also near Kindergarten. If you sit quietly and watch, you are likely to see butterflies, moths, bees, and hummingbirds.
There are lots of lesson plans involving pollinators. Here are some examples.
Here is a pollination activity book, including information, coloring pages, and word searches.
Here is an activity about pollinators and monoculture gardening targeted to 3rd grade.