Using this liquid timer is super easy. Just give it a flip and the timing starts right away. It's great for timing activities in the classroom or during games. For those with kids aged 3 and up, it can be a fun way to teach time - management. When it comes to maintenance, keep it away from sharp objects to avoid damage. Also, don't expose it to extreme temperatures as it might affect the liquid inside. If you want a specific color, remember to write it in the order notes, but keep in mind that we can't always guarantee the color you choose.