Don't make it
Working model for what, exactly?
Gyroscope will make a good working model .
in delhi you will buy it from janak puri
talim and suchi paps
a physics model can be excellent if it has a right demonstration correct working and display and capability to impress the audience right;y
A Burgular Alarm
working model of noise pollution for class 3
There are several ways one can make a working model of an earthquake. You can use an empty 2 liter bottle, clay, baking soda, and dish detergent to make a working earthquake.
yes,i want simple but good science project on reflection of sound can you help me
manhattan
Working model of SST
First, get a good understanding on the "anything" you want to model.