The kids really enjoyed sorting through a collection of buttons. They sorted by color and shape. They ordered buttons from small to large and they found some very strange looking buttons among many very common ones. If you have Grandma's button collection, take it out and have fun sorting!
My brother ended up with a button collection after our Mom passed away. He had a shirt decorated for me with many of the buttons. It was so fun looking at them and remembering (very distantly!) that we had once spent hours sifting through those old buttons. GREAT memories!