Set up a play area outside. You can have anything from a swing set and sand box, to a tree house and basketball hoop. There are a lot of outdoor options. Give your kids a spiritual heritage. Just from a social and educational point of view, your kids should know about God.
Children have a spiritual core and spiritual needs.
Show your kids how to pray. Prayer teaches thankfulness and provides comfort when nothing else seems to help. You can use Christmas, Hanukkah, or Kwanzaa as a springboard to open up discussions about the deeper meaning of life. Inspire your kids. Involve your kids in volunteerism.