Here is Daddy helping Daughter assemble her Magic School Bus solar system mobile. The kit was $10 from Scholastic and it came with the book The Magic School Bus Blasts into Space, and some glow-in-the-dark star stickers. Daddy did half of it, and Mommy finished up. I had to use tweezers (and a reading lamp) to knot the fishing line. It was "knot" easy.