Most of us have never thought about building an educational toy by ourselves. If we need a learning toy or something, we_________ go to the nearest store and buy it. However, things are not as easy in third world countries. With families even having no food to put on the table, buying toys, especially the educational ones, is the last thing on the parents’ minds.

So _________ can one get these kids interested in science? This was a question that worried the Indian engineer Arvind Gupta so much that he decided to give up a good job and spend his life making toys from trash, things that people no longer want or need!

Mr. Gupta began teaching in the 1970s. While still an engineering student at the Indian College of Technology, he volunteered to teach the children who could not _________ to go to school. Upon graduation, he found a good job at India’s Tata Motors and spent the next five years designing cars.

But he soon realized that this was not something he wanted to do for the rest of his life. So he took a year’s training course and took part in the Hoshangabad Science Teaching Program whose _______  was to make science fun and exciting for poor children using available materials.

Mr. Gupta found the whole project so satisfying that he decided to leave his high-paying job and focus his attention on designing educational toys that were not only cheap and easy to build, but are also full of scientific principles（科学原理）, _________ children could get interested in this interesting subject.

When the Internet started becoming a more widespread learning tool, Mr. Gupta created a Toys from Trash website and also recorded over 250 YouTube videos.

Today, over 50,000 children and teachers visit the website daily to download the videos for the toy creations based on cool science. Some young children have become _________ inspired（鼓舞）that they have even won international science competitions with the help of his creations.