In honor of Maria Montessori's birthday today, I wanted to share a link to the Deb Frasier's website of my favorite birthday book On the Day You Were Born. The webpage also includes a curriculum guide for teachers and a play that you can do with a large or small group of people.
This book is a great one to use for Montessori birthday celebrations because it talks about the scientific celestial happenings in a person's life (such as moon phases, Earth's travel around the sun, and tides) as well as many of nature's amazing occurrences (like gravity, photosynthesis, and the variety of animal species).