Infants and toddlers grow in dramatic spurts by making steady gains over time in little spurts slower than at any other time during childhood.

in little spurts

Explanation:

Any growth of development that occurs to human BEFORE puberty will occurs in little spurts. There are only little changes in their body and their capabilities would not improved as much.

The majority of our changes occurs after we hit puberty (started between the age of 10 -14 for women and 12-16 for men). During this period, we will experience a massive surge of hormones that drastically alter our body, It will massively increase our overall strength, reproductive ability and our brain capacities.

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