A modified version of a Montessori "oldie, but goodie" that allows students to begin to understand the major planets (and I couldn't leave out Pluto) of our solar system. I suggest this activity as a introduction to the solar system. Using Post-It notes and rulers, children follow step by step instructions to lay out a simple "to-scale" model in any hallway or outdoors. The finished product is perfect for remembering the number of planets, the order of the planets, and for drawing initial con