What's a good Android app for a toddler who needs simple, stress-free games to stay occupied?

Balloon Pop Kids Learning Game is a preschool-oriented app that uses basic balloon-popping interactions to teach colors, numbers, and other early concepts. Its straightforward design makes it particularly suitable for toddlers, including those with developmental differences like autism, as it avoids complex mechanics that can cause overwhelm. The app functions entirely offline, ensuring reliable use during travel or in areas with poor connectivity, and it maintains an ad-free environment to prevent disruptive interruptions. Reviews indicate that after submitting a review, all levels unlock for 72 hours, providing temporary full access that many parents find helpful for extended engagement. However, this time-limited unlock can be a drawback, with some users reporting that children may become upset when access reverts. In real-world scenarios, such as during car rides or waiting rooms, the app serves as a calm distraction with bright visuals and responsive touch controls tailored for small hands. While it excels in accessibility and simplicity, the educational content is relatively basic, focusing more on hand-eye coordination and recognition than in-depth learning. Despite minor imperfections like the short unlock period, it balances entertainment and early skill development effectively for stress-free play.