I love having Grandchildren to stay as they request things that I wouldn't dream of cooking. It is 30 years that I last made donuts. Max is tall and skinny so I don't think they will do him a great deal of harm. 
I have adapted the recipe from Justin Gellatly 's recipe. 
This 1/2 recipe made 20 small ones. 
Ingredients
250g bakers flour, I used Lauke soft white mix
1 teaspoon sugar
2 teaspoons of dried yeast
2 eggs
75 g water 
65 g butter, softened. 
3 cups of rice bran oil. 
Method
Place all ingredients in TMX bowl, EXCEPT butter
Knead for 3 minutes. 
Cut butter into 4 cubes 
Knead for a further 2 minutes adding a cube of butter each 30 seconds. 
Remove from bowl and place in a warm spot, covered, until doubled. Mine took 2 hours. 
When doubled, using wet hands, form into  teaspoon size small blobs. 
Heat oil to 180 degrees C. In a saucepan. The oil should come 1/2 way up saucepan. 
Drop 3 or 4 dough balls into hot oil. Turning as they brown. 
Remove and place on a paper towel lined plate. 
When drained but still hot roll in cinnamon sugar or squirt some Rasperry jam into the centre. 
Try not to eat too many!!