Mix the Ingredients: In your bowl, combine the 1 cup cornstarch and 1/2 cup lotion. At first, the mixture will seem extremely sticky. Don't worry, that's perfectly normal!
Stir with a Spoon: Use the spoon to mix the ingredients together. Make sure to scrape the bottom and sides of the bowl to incorporate all of the cornstarch. Slowly add the 1/2 cup of cornstarch a little bit at a time and mix with the spoon until the mixture starts to form a ball and peel away from the bowl.
Knead by Hand: Once the mixture is roughly combined, dust your hands with a bit of cornstarch and start kneading. It will be sticky at first, but as you continue to knead, the mixture will start to come together.
Add More Cornstarch if Needed: If the mixture remains too sticky, lightly dust your hands with more cornstarch. Continue kneading until you reach the consistency of playdough - moldable but not sticky.