I figure by the time he's 3 or 4, he should be able to make them all by himself.
(adapted from the Joy of Cooking)
1 c whole wheat pastry flour
1/2 c all-purpose flour
3 tbsp sugar
1 tsp salt
1 3/4 tsp baking powder
4 tbsp butter, melted
1 1/4 c milk
Combine dry ingredients in a medium bowl.
Stir together butter, milk, and egg. If your milk is cold from the fridge, add it slowly to the hot butter and mix constantly with a fork to prevent big chunks of butter from forming.
Add wet ingredients to dry ingredients and mix to combine. Add extra milk if it's too thick.
Drop scant 1/4 c portions onto a hot, lightly oiled (or non-stick) griddle or frying pan. Cook until dry around the edges and bubbles appear in the center. Flip, and cook just until done, about 30 seconds to 1 minute, longer.
Makes about 10 4-inch pancakes.