Gever Tulley is a computer scientist from California. In 2005, he started a summer programme for children called Tinkering School. The idea was that children can learn important skills for life by building things together. Gever Tulley and his team help the children to think big and create plans for innovative things they want to build. Children have made fantastic things since the school started. They have built a rollercoaster. They have made a rope bridge from plastic shopping bags. They have made tree houses, wooden motorbikes and boats. At Tinkering School, children get all kinds of materials like wood, metal, plastic, nails and ropes. They get lots of real tools too, such as knives, hammers, screwdrivers and power drills. Some children have cut themselves when using a knife, or hurt their fingers when using a hammer. Tinkering School has been around for many years now, but nobody has ever suffered a serious injury in all those years. This is because there are strict health and safety regulations they must follow. The children always learn how to use the tools safely and they must wear the right clothing and protection at all times. Gever Tulley's ideas have worked very well. A lot of children have gone to his summer schools over the years. In 2011, Gever Tulley and a colleague decided to create a 'real' ! school, called Brightworks, in San Francisco. The school is very small-it only has 20 students aged 6 to 13. Brightworks is based on the same principles as Tinkering School. Since it started, Brightworks has been written about a lot. Most of those articles have been very positive. They have praised the quality of the school. They have found the children are more motivated than at many other schools. But since the beginning of the school there have also been critical voices. Some people have said that children are not learning enough at Brightworks. They feel that students and teachers are just 'playing around' all the time. The students at Brightworks seem to love their school. We spoke to 12-year-old Tina Cooper. She has been a student at the school since last October. 'Since I started here, I've never sat in a 'normal' class with a teacher,' she told us. 'But it's been a very exciting experience. I've worked hard at my new school for eight months now, and there hasn't been one single moment when I found it boring. Before, I was bored quite often.'