Montessori Octahedron Mobile DIY Kit--Visual Stimulation and Development for Baby EVERYTHING YOU NEED to make the octahedron mobile for your Montessori nursery, infant community or nido. DIY set includes: three pre-made octahedron sets (yellow, red, and blue), two transparent dowels pre-cut to appropriate lengths, thread for hanging the shapes and dowels, and of course, instructions. VISUAL STIMULATION the octahedron mobile is the second mobile in the montessori visual series and is generally first shown between 5-8 weeks as your child begins to discriminate different colors blue yellow and red. LOVELY AND NATURAL makes a beautiful addition to your home or area for baby. EASY TO MAKE takes 15 minutes to set up, and then just hang and enjoy!