Bob is saying, "The mandatory sleeping hours:Newborns: 12 to 18 hours
Toddlers: 12 to 14 hours
Preschoolers: 11 to 13 hours
School- aged kids: 10 to 11 hours
Teens and Preteens: 8.5 to 9 hours
Adults: 7 to 9 hours
Bob the Sleep Master. Copy right to Grace Chang
Bob is so awesome and gives the best comments on everything. He IS the sleep master
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