This instructable will provide you with the details on how to build a hermit crab cage. If you're not a fan of hermit crabs, you could use it for hamsters. Or lizards. Or mice. Or...well, you get the idea.
The kids decided they wanted to get hermit crabs this summer, but when I saw the price of new cages at the boardwalk sea shell shops, I knew I could make them a larger cage much cheaper.
Kiteman and RedThreadsOfFate added some words of advice on keeping hermit crabs and I think it should be pointed out as well. Hermit crabs require an environment with high humidity (70-80%). Although this mesh cage will not provide that environment, it will serve as temporary housing until a more suitable, permanent home can be found.
If you're interested in learning more about caring for your hermit crabs, take a look at one of the following sites:http://hermit-crabs.com/http://www.hermitcrabassociation.com/http://www.crabstreetjournal.com/