Add 2 ½ cups of play sand and 1 ½ cups of cornstarch into a mixing bowl. Stir well to evenly distribute everything.
Slowly mix in the ½ cup oil.
Use your hands to knead the mixture until it’s fully combined and has a soft, moldable texture. If it’s too dry, add a tiny bit more oil. If it’s too wet, sprinkle in a little more cornstarch.
Let the sensory play begin!