Puzzles build fine motor skills, hand-eye coordination, and problem-solving strategies. Here is the progression of puzzle solving for babies and toddlers.
How Do Puzzles Help With Child Development? - Twinkl
The Importance of Puzzles for Toddlers' Development - Empowered Parents
Jigsaw Puzzles: Key Developmental Benefits for Your Child – mideerart
The Importance of Puzzles for Toddlers' Development - Empowered Parents
Montessori Puzzle Progression - Guide & Grow
The Importance of Puzzles for Toddlers' Development - Empowered Parents
How puzzle progression benefits toddlers
Puzzles Benefits & Progression — Sunnyseed
Puzzle play by age (and developmental stage)