When in a stressful situation, these lower centers of the baby's / toddlers brain go into a primal survival response commonly known as fight / flight / freeze. (familycontinuum.com)
Just like teen brains prefer to stay up later and wake later, toddler brains just seem primed to start the day with the sun (or even before it!) (tinyfry.com)
Toddler brain boosters require your little one to participate in activities, not just watch. (sixtysecondparent.com)