the profesional wire stripper...

today i worked with louisa and lucy. we worke on motors and watched a video about makeing a vacuem. first we made a straw that sukup a needle to the center to da that we had to rap wire arond the straw and strip the wires at the end. then we put the to ends to a magnet and put the needin the opening of the staw. it was sucked in to the middle of the straw i am wondering what the effect would be if we used a bigger straw and a bigger magnet.