Shortbread - easy to make and she can help with the kneading and rolling and then the cutting out I use the recipe on the side of the box of McKenzies rice flour and they are really yummy.

225g plain flour
pinch salt
115g rice flour
115g castor sugar
225g butter

Sift flours into a bowl and add sugar, rub in butter and knead till smooth paste forms (I usually do this first part in the food processor til I get fine crumbs, then turn it out to knead it). Turn onto floured board/surface and roll. Cut out shapes as desired. Place on cold, greased tray and cook in a slow oven for 3/4 to an hr or until pale golden brown.

As an alternative, I also like to chop up glace cherries and gently press them onto the shapes to decorate before putting in the oven, or I make traffic lights - cut the dough into a rectangle and use the red/yellow/green ones for lights.