DescriptionIt is 2 sets of DIY anemometer scientific toys, it can exercise your childrenpractical ability, train your children observation capability, thinkingand analytical skills. It is made of premium material, which is durable andlasting for use.Features- Color: Assorted Color - Material: Plastic - Size: About 18.50X7.00X2.00cm/ 7.27X2.75X0.79inch. - Made of material, not easy to get damaged. - Greatly improve kids hands-on skills and children's imagination and operation ability. - Can be used as a teaching model. Classroom, homework and school production competition. - Scientific experiment to exercise student's practical ability. - It is a good gift for kids. Also, an experiment and teaching model for classroom.