You can watch many of these art lessons on YouTube for free to practice drawing. You can watch through a desktop computer, the YouTube mobile app (Android and iTunes), or even through the YouTube app on a smart TV.
If you have some concerns with your children using YouTube, you can check out the YouTube Kids app for mobile (Android and iTunes). Visit YouTube Kids. Log in through your YouTube/Google account for more parental controls. Did you also know you can watch YouTube Kids on a desktop? Just visit youtubekids.com!