[Inertia Demonstrator]: This Inertia Demonstrator is designed to effectively demonstrate 's First Law of Motion, making it an ideal educational tool for physics and mechanics experiments [Material]: Constructed from pp, this inertia demonstrator is built to withstand regular use in classroom or laboratory settings [Compact Size]: With dimensions of 173x113x125mm, this demonstrator is conveniently sized for easy handling and storage while providing clear visibility during demonstrations [Educational Tool]: Perfect for teachers and students alike, this device helps illustrate the concept of inertia by showing how stationary objects remain at rest until acted upon by an external force [Wide Application]Great for home, school class use. Also ideal Birthday and for kids, children in middle school, can enjoy DIY experiments fun while learning basic physical science knowledge Color: Yellow Material: pp Package Contents: 1 x Inertial Demonstrator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.