article: 19 September 2016 Last updated at 07:50 BST They used recyclable materials such as shoe boxes, plastic packaging and egg boxes to make them. They went to see how a team from Swansea University are building a real classroom for the future, whose aims are the same. Their classroom is designed to be energy positive - that means they don't have to buy electricity and they have solar panels that use the sun to power them.
summary: Kids in Swansea have been showing us their designs for buildings for the future, which they say should be as energy-efficient and kind to the environment as possible.