Display dessert toppings: Use an ice-cube tray to offer up ice cream embellishments, such as sprinkles, cherries, and chopped nuts.
Cut cookie dough: Roll the dough flat, then press an upside-down ice-cube tray into it for a dozen or more identical treats. Use trays with different shapes (stars, hearts) for miniature holiday cookies.
Organize desk supplies: Contain small items like thumbtacks and paper clips, or sewing notions, like buttons, beads, hooks, and eyes.
Inspire creativity: Mix paints for the kids' art projects in a tray's compartments.
Freeze extra pesto: And leftover cooking wine, broth, and sauces for cooking. Then store the cubes in plastic freezer bags until you're ready to use them.