How to make tractor supply troli using dc gear motor at homemade science project

Dc gear motor se ghr m mini tractor supply troli Kesy banain Dc moter se tractor Trolly banany ka zabardast treeqa kar very interesting video cool science project #youtubechannelashalexperiment Science project for students class seven diy invention science experiment Diy ideas science Diy invention life hacks cool science project very simple very interesting and amazing video