Based on the users' reviews of the "Fun Jigsaw Puzzle for Kids 4 years" app, here are three cons and pros in English, within the 15-word limit for each item: **Cons:** 1. Some users found the app's design and graphics too simple and uninspiring. 2. A few reviewers experienced glitches and technical issues with the app. 3. A small number of users felt the app was too repetitive and lacked variety. **Pros:** 1. Many users praised the app's ease of use and intuitive interface for young children. 2. Reviewers appreciated the app's ability to help kids develop problem-solving skills and critical thinking. 3. Parents and caregivers enjoyed the app's educational value and ability to keep kids engaged for hours. Please note that these are summaries of the reviews, and individual experiences may vary.