Even though pencil cases are not on the school supply list, there are always a few students who bring one their first day of school. I used to tell them to keep the cases in their backpacks, or to take them home, until I realized I was missing a great storage opportunity.
Card games fit perfectly in the cases with the clear window. The window allows the students to see which game is inside.
The cigar box type is a wonderful container to put some sand in so the children can practice writing their numbers, letters, words, and their names.
The pencil box (above) can hold dominoes, dice, game markers, or whatever else you need to store.