DR MED* Perforate Module, teaches students operate with accuracy, made up of ten forged screw eyes (small metal loops) that rotate 360 deg. Students are expected to thread the pipe cleaners through the loops, skills improve, the
Square Friction Cube With Hook, 4 Surfaces, 2 Inch, Provides Four Surfaces For Exploration Into The Force Of Friction. Each Side Of The 2in Cube Provides A Surface (Wood, Paper, Vinyl, Sandpaper) With A Different Coefficient Of Friction