Speech development: Cooing (2-3 months), laughing (3-4 months), babbling single sounds "ba ba" (4-6 months), babbling with variety "ba da ma" (6-9 months), first words around 12 months. Babbling is practice for real words! Babies experiment with sounds and learn language rules by listening and repeating. Responding to baby's sounds encourages more talking. Have 'conversations' by mimicking sounds back.

Crawling typically starts between 7-10 months, but range is wide (6-12 months is normal). Many styles: traditional hands-and-knees, army crawl (belly on floor), scooting on bottom, crab crawl (backward first). Some babies skip crawling entirely and go straight to walking - this is normal! Once mobile, serious baby-proofing is essential. Baby can get into dangerous areas quickly.

Hand-eye coordination develops gradually: Batting at objects (3 months), purposeful reaching (4 months), grasping successfully (5-6 months), transferring objects between hands (6-7 months), pincer grasp (8-10 months). Early reaching is inaccurate - baby swipes at objects and misses. With practice, becomes more precise. Grasping starts as whole-hand "raking" motion, progresses to thumb-finger pincer grasp. Crucial for self-feeding, playing with toys, and later writing skills.