I started cooking with my daughter when she was that age. It can be fun to discover things together. I started off with:
SCONES
2 Cups of Flour
4 Teaspoons of baking powder
Pinch of Salt
50 grams of butter
2/3 cup of milk (or thereabouts)
Sift the flour, baking powder and salt into a bowl. Cut the butter into chunks and rub it into the flour (this is the bit 2 year olds love) When the mixture looks a bit like breadcrumbs i.e. all the butter is rubbed in, add the milk. For some reason, mixing it with a table knife works best at this point, don't ask me why.
You should have a reasonably sticky dough which you then turn out onto a floured surface and thump and pat into shape (another toddler favourite) Cut or mould into shapes and bake at 220 degrees C for 12-15 minutes.
You can add a desertspoon of sugar and sultanas or rasins for sweet scones or some grated cheese for savoury. Add before the milk stage.
My other standby is:
FRITTERS
Make a batter by whisking an egg with about half a cup or less of flour, a pinch of baking powder and some milk. The mixture needs to be about the same consistency as thick pouring cream. Don't worry about exact proportions of flour and milk, its a fairly forgiving recipe.
To this batter add one, some or any of the following:
Can of sweetcorn
Chopped raw spinach
Grated carrot
mushrooms
mashed potato
left over chopped meat
Any leftovers really. (I make this really successfully with left over curry)
Basically any veg that needs little or no cooking.
Heat some oil in a frying pan and drop spoonfuls of the mixture in. Cook for a few minutes then turn over and cook the other side.
These are a family favourite as it's a great way of using up left overs, it's finger food and therefore good for small hands, you can endlessly tweak with the recipe until you find a mix you like (I once caught dh giving the sluglet black pudding and spinach fritters and she was wolfing them down) and they can be equally good cold with tomato sauce on top.
One final quick and easy recipe.
I keep pitta breads in the freezer. Fish one out, turn on the grill, spread a thin layer of tomato pase over it, cut up a few bits of pepper/tomato/leftover dinner and allow your daughter to arrange it on top. Add some thinly sliced or grated cheese, pop under the grill for a minute ot melt in and hey presto instant pizza.