The rain alarm experiment demonstrates how water droplets on a sensor plate trigger an alarm. The water overflow experiment shows how a buzzer can alert users when water reaches the sensor’s detection level. These activities introduce students to basic circuits, sensor technology and the principles behind rain detection and water overflow alerts. Assembling and demonstrating the models encourages observation, problem-solving and hands-on learning. The paper house adds a visual setting for the rain alarm, while the transparent jar makes the water experiment easy to observe and explain. Suitable for school science exhibitions, physics projects, classroom demonstrations and home learning, this educational kit helps students connect scientific concepts with everyday applications. Designed as a learning model, it provides an engaging way to explore electronics and water-management awareness with guidance from a teacher or parent.