Toddler Growth: Height, Weight & IQ Milestones

Toddler development at 21 months includes significant linguistic and physical milestones. Tracking height and weight percentiles helps identify healthy growth patterns and early signs of a high IQ.

Toddler inside a toy tunnel

Signs of a High IQ in Toddlers

With each new milestone your toddler reaches, you may become more certain that sheโ€™s the brightest toddler youโ€™ve ever seen. Parental biases aside, you could be onto something.

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