We made an Insect Hotel in November, which is a kind of habitat for various insects.
An Insect Hotel typically consists of hollow bamboo, clay with holes, and wood with holes drilled in it; although there are many more ways to make crevices for nesting insects.
Here are some photos
On the whole the hotel has been a success. You could say the hotel has be a buzz with activity ;)
This is a slow motion video of the wasp