Video: Summer activities for kids: build a bug hotel Here, a group of young National Trust correspondents create a "multi-layer habitat system," or, to use a more catchy title, "bug hotel." Every single layer should work as a different habitat. The bottom contains rocks and is ideal for amphibians such as frogs, as well as hedgehogs. "And rats and mice," adds one youngster. A second layer uses twigs and branches, making it perfect for insects, slugs and snails. And then a feeding station for birds is placed on top.