Baking challah with kids is a great activity to do together in the kitchen, and a wonderful way to help them develop a love for this timeless Jewish tradition. When I bake their favorite challah recipe, there's always plenty of dough to let the kids have fun shaping little loaves which they'll proudly eat at our Shabbat table Friday night.
I'd recommend spending a little time practicing braiding and shaping rolls with modeling clay, such that when it comes time to work with the real thing everyone will feel confident and there will be smiles all around. And don't forget to let the kids brush on the egg white and sprinkle on some sesame seeds, the final touch before baking. And if your kids aren't around when you find the time to make challah, why not save a little dough for them in the fridge?