Here's a really easy sorting activity I put together for Little A. Something similar was set up at our ECFE (Early Childhood Family Education) class this winter, and I kept it in mind for a rainy day (or snowy, like it was this morning).
Fuzzy Craft Balls
I got rainbow colored fuzzy craft balls, and punched circles out of matching pieces of cardstock. I set the circles in the cupcake tins, and put the fuzzy craft balls in a bowl and put Little A to work. This kept her busy for a long time. I had 80 fuzzy craft balls, and after she got them all sorted, she asked for more! I call that success!!