The CDC does. [0]. So does the Mayo Clinic [1]. So does the Cleveland Clinic [2]. So does Johns Hopkins [3]. So does the American Academy of Pediatrics [4].

And the WHO does suggest many children wear masks. [5]

If you don't trust even one of these institutions over your own judgement, you are failing to participate successfully in society.

[0] https://www.cdc.gov/coronavirus/2019-ncov/community/schools-...

[1] https://newsnetwork.mayoclinic.org/discussion/benefits-of-ki...

[2] https://my.clevelandclinic.org/-/scassets/files/org/employer...

[3] https://www.hopkinsallchildrens.org/ACH-News/General-News/Ki...

[4] https://www.aap.org/en/pages/2019-novel-coronavirus-covid-19...

[5] https://www.who.int/news-room/questions-and-answers/item/cor...