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Cognitive development: One-year-old.

American Academy of Pediatrics.https://www.healthychildren.org/English/ages-stages/toddler/Pages/Cognitive-Development-One-Year-Old.aspxOpens a new window[Accessed May 2020]

AAP.

Cognitive development: Two-year-old.

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American Academy of Pediatrics.https://www.healthychildren.org/English/ages-stages/toddler/Pages/Cognitive-Development-Two-Year-Old.aspxOpens a new window[Accessed May 2020]

AAP.

Language development: 1 year olds.

American Academy of Pediatrics.https://www.healthychildren.org/English/ages-stages/toddler/Pages/Language-Development-1-Year-Olds.aspxOpens a new window[Accessed May 2020]

AAP.

Article image

Language development: 2 year olds.

American Academy of Pediatrics.https://www.healthychildren.org/English/ages-stages/toddler/Pages/Language-Development-2-Year-Olds.aspxOpens a new window[Accessed May 2020]

Nemours Foundation.

Toddlers: Learning by playing.http://kidshealth.org/en/parents/toddler-play.htmlOpens a new window[Accessed May 2020]

NIH.

Your 19-month-old’s behavior: Raising a well-behaved child

Speech and language developmental milestones.

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How can I get my 2-year-old to stop hitting me?

little boy running in nature with raised hands

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Dana Sullivan Kilroy