Although this app is free to download, I recommend getting the in-app purchase because it has additional features and functions that makes this app even more fun for kids. My son loves playing with this app. You start with a blob of color and then move it around with your fingers. Add other colors and continue to turn the blob into art. Kids will love how easy it is to use and how fun it is. After they are finished making their painting, you can save the masterpiece to your iPhone or iPad. You can even share it with friends and family via email or social media.