Lammas. Depending on what kind of witch you are, it has several meanings. For many, it is an agricultural/fertility holiday- drawing on the first harvest or it is a time when the grain is cut. People make wheat weavings and corn dollies at this time.
It is a time when the sacred king begins his sacrifice for the good of the people, too. So in this house, we bake bread (Loaf-mas!) that looks like a person, and "sacrifice" it for *our* common good by eating it. It is a hands-on activity that can be explained to children easily. As he gets older, there will be more pomp and circumstance and ritualized actions, but the point is to tie us to the Wheel, to practice re-tying us to the cycle of the seasons and the Mysteries.
Today, I am creating a special sourdough starter that I plan on keeping for sabbats and passing onto my son when he finally leaves home- a starter steeped in tradition and The Craft. What are you doing to teach your children about Lammas?