What's a good Android app for keeping a toddler quietly engaged during long waits or appointments?

Coloring & Learn is a well-suited option for parents needing a reliable digital distraction for young children in waiting rooms, during travel, or at restaurants. The app's core strength lies in its straightforward, touch-responsive activities that require minimal instruction. Children can tap to fill colors in outlined drawings, trace numbers and letters with their finger, or play simple cause-and-effect games like popping balloons. This variety within a single interface helps prevent boredom during extended periods of limited mobility. Reviews indicate the app is particularly effective with children aged 2-4, who can operate it independently after a brief demonstration. A key feature for these scenarios is the lack of complex menus or fail states; a child can tap almost anywhere on the screen and create a visual or auditory response, reducing frustration. The drawing board mode also allows for completely free-form scribbling, which can be a useful outlet for restless energy. However, the free version includes occasional video ads between activities, which can interrupt engagement and may require an adult to close. For a completely seamless experience, the paid upgrade to remove ads is a consideration. Overall, its simplicity and variety make it a practical tool for turning a challenging wait into a manageable, and even slightly educational, interval.