Colorful Office Thinking Hand Boiler, Glass Science Energy Transfer, Children Science Experiment, Love Birds Color Meter Hand Boiler, 4 Pcs (Red&GreenBlue&Purple) by C&H Solutions®

The "Description Hand Boilers" are an incredible science toy that allows you to experience the fascinating process of energy transfer in a unique and interactive way! Simply hold the large bulb end on the bottom in the palm of your hand, and within minutes, your body heat from your hand will cause the liquid inside to rise.

This is an excellent demonstration of how heat can be transferred from one object to another without any external force or energy source.

The boilers come in four different colors (red, green, blue, and purple) and are made with high-quality glass that ensures safe use.

They are also easy to clean and maintain, making them a great addition to any home or classroom.

With the "Description Hand Boilers," you can learn about energy transfer in an engaging and fun way!