Sorting is a fun activity to do and a great skill to have. A good place to start when beginning to sort is with colors. Colors are everywhere and most likely you have colored objects around your class or house.
I used big lego blocks to sort by color.
I laid out colored construction paper and we put the blocks on each paper to match the color.
If you don't have color paper at home i have included a page for you to print out with colored squares.