Homemade Playdough with Sprinkles. There is just something about sprinkles that makes a person smile. In fact, it just might be impossible to even look at sprinkles and not instantly feel happier. Sprinkles are synonymous with birthday parties and happy celebrations, and our sprinkle playdough fits the bill. No doubt our homemade playdough recipe with sprinkle mix-ins would make for the perfect birthday party activity or party favor but why wait for a party to enjoy sprinkles? We say celebrate today and what better way than with sprinkle playdough. So, without further ado, please read on for our easy, one-pot playdough recipe and all the delicious pictures of this celebratory playdough invitation to play.