sowmya 
you can build a river flood alarm working model with a riverside city and village concept, where the alarm activates when the water level rises to a dangerous level. Materials Needed: Cardboard & Color Paper (for city, village, river, and landscape)Plastic Tray or Small Tank (to represent the river)Water (to simulate flooding)Metal Probes (Nails or … Read more
You can build natural disaster alert alarm working models for flood, earthquake, and fire detection using simple components like LEDs, buzzers, and sensors. 1. Flood Alarm Model Concept: The water level rises and completes a circuit to trigger an alarm. Materials Needed: How It Works: 2. Earthquake Alarm Model Concept: A simple pendulum detects vibrations … Read more
What if I told you that a few plastic lenses and a cardboard tube can turn into a device that lets you see things you never imagined? Let’s build a working microscope! For your microscope working model, here’s how you can build it using cardboard, an LED light, a transparent sheet, a cardboard pipe, color … Read more
This project will demonstrate hydroponics, a method of growing plants without soil, using waste bottles, pipes, a DC water pump, a 9V battery, switch, plastic tray, color paper, and a glue gun. The model will simulate how plants can grow in a water-based system, providing a real-life application of modern agricultural techniques. Materials Required: Waste … Read more
This project will demonstrate a volcanic eruption using waste papers, glue, paint, a plastic bottle for the eruption effect with smoke. The model will showcase how a volcano works with lava and smoke, all created with simple materials! Materials Required: Waste Paper (old newspapers or an scrap paper for the volcano structure)Glue (to bond the … Read more