What are new development for age 11 to 12 pre-puberty?

Body growth such as; height, weight, muscles, and facial/body hair. A change or deepening in the voice.

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It doesn't state that he washed his hands before or after preparing this poultry. even though he had it in seperate bags the bacteria from the poultry could have entered the vegtables because of a lack of handwashing. so cross-contamination is a very possible answer.