Grab a handful of buttons. Make sure there are all different kinds and colors.
If you don’t have buttons, use any pile of objects, like matchbox cars, coins, nuts, etc.
Now group the buttons according to size, color, texture, number of holes, shape, etc.
You can do this activity with shells, peanuts, plant leaves, or the back of your desk drawer. Is it easier to organize the non-living or the living things?