Question

idea about science model

Answer 1

smart city.,and hydrolic crane,or search on YouTube these give best idea

Answer 2

just make a smart home lighting using pir sensor or a water level controller using ic 555 or make a remote controlled device using stop 1838 ir receiver these are the best ever made science model surely you will be honoured after making this just make an electronic model they are far better than mechanical models you can ask me about this I will help you have a good day