Great value - Nine science projects in One!These units all versatile, with options for advanced or simplified research projects.Suitable for a one year Physics of Toys BPL curriculum!!! The bundle includes:magnetic oscillation projectGravity 2D curvature 2 Rain Stick ideasSlinky wave physicsChaos theory magnetic pendulum The drinking bird heat engineand lab techniques in hands-on engaging unit 2 Helicopter Balloon projects and a DIY pin hole camera - or the camera obscura.All originals, no men