The road which taken
Once upon a time, 4 friends were studying in same school and they all have different skill accordingly, they were the students of high school, one day there were science exhibition was going to take place in that school. The 4 friends took participate in science exhibition they wanted to make a self charging vehicle for their projects. They firstly try to make the design and structure but they failed ,they tried again and they still failed, 3rd of his friend to not make design we should apply di