Some grandmothers have cups and plates in all shapes and sizes. The complete dinner setthat once was, is over the years pretty decimated. Of course, the cups and bowls are replenished, but there is no uniformity anymore.
Draw grandma's cupboard. Draw a beautiful antique cabinet with different shelves. Paint your drawing with tempera. Show in your work the different styles and colours in plates, cups, mugs and bowls. Maybe your grandma has even different colours of wallpaper sticked on the inside of the cupboard!