You may need to add more water. This dough doesn't last as long as the cooked recipes. Add oil and water. Wearing gloves, knead for 10 minutes. Store in zip lock bag in refrigerator.
Kids love making the white playdough change colors.
Use unsweetened Kool-Aid for color and scent. Add glitter for sparkly playdough. Here's an idea from one of our visitors. If you add vanilla extract to homemade playdough, it helps preserve the dough, prevent mold, and makes it smell nice. Peppermint extract works too.