I am always amazed how the simplest things can keep children engaged for so long. The kids in my care love, love, love to use the pipettes (or those little medicine droppers). It is so great for strengthening those little muscles needed for writing, cutting and all those other fine motor skills they will use so much in Kindergarten. All I did was put out some ice trays, colored water, and a tub of ice cubes. They mixed colors, learned about volume, cause and effect, sharing, and loads of language! So simple and so many skills being used!