These books are a great resource for teaching your children to overcome many concerns related to mental health. These books can be found on Amazon.
https://www.amazon.com/What-When-Worry-Much-What/dp/1591473144/ref=sr_1_3?crid=32S90GVH0CW0V&dchild=1&keywords=what+to+do+when+you+worry+too+much&qid=1584649276&sprefix=what+to+do+when+%2Caps%2C218&sr=8-3