Preschool kids love to build things with play dough, which improves motor skills and develops imagination. This tried and true recipe for play dough can be divided into several colors and scents after the dough is mixed. Parents or older siblings can place 2 ½ cups water, 1 ¼ cups salt, 1 ½ tbsp cream of tartar, 5 tbsp vegetable oil, and 2 ½ cups flour in a deep pot. Cook the dough over low heat stirring constantly until the edges of the dough along the sides and bottom of the pan are dry and the consistency feels right. Place the dough, which will stick to paper, on a smooth wood, plastic, or vinyl surface, such as a large cutting board. Kids can knead the warm dough until its smooth and divide it into balls for each different color. Kids can flatten the ball into a disk and add a drop or two of food coloring and a drop or two of rosemary, lemon, or lavender essential oil. Knead each ball to get the desired color and scent, adding more drops if needed. Kids can poke it, roll it, stretch it, squeeze it, and shape it. Play Dough will keep for months in a zip lock bag or sealed container.