I feel that kids deserve to be taught about the spiritual side of their being as much as they deserve language or scientific instruction. Every religion includes songs and stories about why the world works and why certain holidays are celebrated. Tell your children these stories. Also, a great number of books exist that include wonderful characters and tales related to nature and other non-mainstream religions. Activities related to the holidays also provide a sense of family unity and a gateway to discussion about what you believe and why.
Some parents even have special rituals and ceremonies just for kids.
The biggest issue that many parents who practice alternative religions face is prejudice . Like it or not, some people will always fear what they don't understand. If your child is older, talk to them about why your religion is not accepted by some people. Talking to the child's teacher is also an option. Some families have even turned to homeschooling in order to spare their children the negative comments from other children and adults alike.