Infants normally are able to sit, stand, stoop, climb, and walk within the first:

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Infants typically achieve these motor milestones in the first year of life. By around 6 months they may start to sit unsupported, and by 9-10 months they may start to crawl, stand, and cruise along furniture. By 12 months, many infants are able to take their first steps and walk independently. While there is variation in the exact timing of these milestones, most typically-developing infants will have achieved them by their first birthday.

Infants Normally Are Able to Sit, Stand, Stoop, Climb, and Walk