As with all animals, small children should always be supervised. Most of the general information is provided in the Small Animals Guide.

A few things to remember, as with reptiles and rabbits, Never use Cedar or Pine bedding. These substrates (bedding) have a strong odor and can be toxic to animals or cause severe allergic reactions. If you choose to use branches, make sure they have not been sprayed with pesticides. 

Most small animals, such as rodents, have teeth that grow continuously and require something to gnaw on.

Another thing to keep in mind is the time of the day the animal is more active. If they are nocturnal (up during the night), this is usually not a great pet for children. For example, hamsters tend to be nippier when woken from their daytime nap.

Check to see if your area has a rescue. There are many small animals, such as Ferrets and Rabbits, that could use a good home.