The PJ Library is a non-profit organization in the Bay Area that sends Jewish kids free books that are appropriate to their age level throughout their youth. We just got a new book from them called, "The Challah Book." It inspired us to take out the cookbook my brother and I wrote called, "Marsha's Kitchen" which has my grandfather's famous challah recipe in it (the challah book also has a recipe at the end).
The whole project took an entire morning; it is no wonder my grandfather used to do one step, then take a nap, then the next step...
But the little guy got really into it. He helped crack the eggs, and measure out the yeast and flour, and mix everything together. He even helped knead the dough.
You see him here, after the first rising, rolling the dough into snakes to be braided.
He also enjoyed brushing them with egg yolk and sprinkling on the sesame seeds.
I don't have a photo of it, but he also enjoyed eating them, and asked for more (and to make them again).