I made three bumblebee homes with some children in the wildlife garden this week, and I really think this is something we can all do. Great for bumblebees... even better for bored children! The BBC breathing places website is a fantastic place to start for all sorts of mini-projects.
Creating homes is a really appealing task because children (and some big kids!) love the idea of shelter and 'homing' something, a bit like a pet. But do remember that it is just as important to encourage or grow food sources for wildlife in your gardens too. In this case for bees, plenty of flowers - in a variety of shapes - to provide a source of nectar. At this time of year, you might even want to think about where bulbs such as crocusses might go, or think about introducing ivy for some late nectar. Our Homes for wildlife pack has a lot of advice on this kind of thing.
And don't worry if it doesn't look right first time. Our wildife garden is changing all the time so be experimental!