Phase 3 — 3 to 6 months
Hands, voice, discovery — sensory explosion
An explosion of motor and sensory skills. The baby discovers her own hands, then her feet, then objects. Around 6 months she enters the sensitive window for language learning.
An explosion of motor and sensory skills. The baby discovers her own hands, then her feet, then objects. She starts integrating senses. Around 6 months she enters the "sensitive window" for language learning identified by Patricia Kuhl at I-LABSKuhl 2014.
Expected milestones (by end of 6 months)
- Rolls from belly to back and vice versa
- Sits with support; some babies sit alone for short periods
- Grabs objects and brings them to mouth (oral exploration)
- Babbles with consonants ("ba", "da", "ga")
- Laughs out loud, clearly shows joy and discomfort
- Recognizes her own name
Priority practices
- Free floor time. Firm rug, no restrictive playpen. Restrictive equipment (jumpers, bumbo seats, walkers) delays motor development.
- Simple, open-ended toys. Stacking rings, fabric balls, soft blocks. Avoid electronic "educational" toys — research shows they reduce quality of parent-baby interaction and expressive languageSosa 2016.
- Increase parentese and turns. The sensitive window for phonemes starts at 6 months. Babies exposed to multiple languages in this phase preserve the ability to discriminate all sounds.
- Interactive shared reading. Point to pictures, name, ask questions ("where's the dog?"). Even without verbal response, she's building receptive vocabulary.
- Mirrors. Baby (unbreakable) ones. Around 6-9 months self-recognition begins to develop.
- Anticipation games. Peek-a-boo teaches object permanence.
References
- Kuhl, P. K. et al. (2014). Infants' brain responses to speech suggest analysis by synthesis. Proceedings of the National Academy of Sciences. doi:10.1073/pnas.1410963111
- Sosa, A. V. (2016). Association of the type of toy used during play with the quantity and quality of parent-infant communication. JAMA Pediatrics, 170(2). doi:10.1001/jamapediatrics.2015.3753
Related articles
Quick reference
Bedside tables to consult fast
The key tables from the guide in one place — sleep by age, tummy time, motor and language milestones, and pediatric visit calendar.
Phase 6 — 12 to 24 months
Walking and naming the world — language explosion
Independent walking frees the hands and the brain. Vocabulary jumps from 1-3 words at 12 months to 50-300 by 24, with the first two-word combination around 18-20 months. The baby becomes a child — and the adult must hold firm limits calmly.
Phase 5 — 9 to 12 months
Movement, first words, first gestures
Pre-walker. Cognitive abilities explode. Language comprehension is far ahead of production (understands dozens of words, says 1-3). Imitation becomes the main learning tool.