Product Name: Science and Technology Small Production: Earthquake Alarm
Weight: about 55g
Dimensions: 8*6*12.5cm
Packing: opp self-sealing bag
General knowledge of seismograph: In 132 AD, Zhang...
Features: This series of products combines physical science, energy utilization and spatial thinking perfectly into a multifunctional and visualized educational toy, which is an educational...
Science and technology small production kit: Madburg ball [Design concept] There are many aspects in human life and production that need the knowledge of atmosphere and atmospheric pressure...