Are you still looking for some teaching tools to let your student know the electrostatics? Then, our electrostatic experiment equipment set is one of the for you. Adopting , durable for . A perfect physics teaching aid for you. Features -Color:Multi -Material:ABS -Size:15.00X4.00X4.00cm/5.89X1.57X1.57in -Note: random color accessories. - Easy for middle school students and kids to explore, also get interested in physic class. - Light weight and portable, more convenient to store and carry, a great equipment for students to learn the electrostatics. - To promote students' understanding of basic electrostatics knowledge, not only educational, but also very interesting. - These electrostatic science tools are good helpers for teachers, parents, train teachers, professors, etc. - Easy to use, simply put the balls into the bottle, and rub the plastic board on the fur or clothing, and let it close to the bottle, watch how the ball . Package list: 4 x spoons 2 packs x small balls 2 x bottles 2 x plastic boards