Based on the users' reviews, here are three cons and pros of the Happy Tens Number Blocks Fun app: **Pros:** 1. Engaging gameplay makes learning numbers fun and interactive for young children. 2. Colorful and intuitive interface helps kids develop cognitive skills and problem-solving abilities. 3. Effective in building a strong foundation in counting and basic math concepts for under 10s. **Cons:** 1. Some users find the app too simplistic and not challenging enough for older kids. 2. Limited parental control options may lead to issues with child safety and responsibility. 3. The app can be glitchy at times, causing frustratingly frequent crashes and restarts.