coaching

Who are you to train? are you titled? FIDE trainer?

LOL  I am not beginner and don't need ur training.

Online ratings are meaningless, also 1300 blitz is not beginner, it is not even chess, just blitz.

If I played more serious OTB, in which I don't, I would consider coaching, preferably from a titled player, not from some nobody like the OP.

Solutions to the main query, please!!??

Holy insecure, Batman.

Look at chesskid.com. /https://www.chesskid.com/

"... I've known many very low-rated chess teachers who are absolutely excellent. ..." - IM Jeremy Silman (2016)
https://www.chess.com/article/view/can-anyone-be-an-im-or-gm

There might be something helpful in a 2013 Silman article, Dinos to the Slav.
http://www.uschess.org/content/view/12291/719/
Books might help you to help the kids. Winning Chess Strategy for Kids by Jeff Coakley
https://web.archive.org/web/20140708094112/http://www.chesscafe.com/text/review332.pdf
has often been suggested in the past around here. If the book is a success, one could also try Winning Chess Puzzles for Kids, Vol. 1 by Jeff Coakley,
https://web.archive.org/web/20140708110137/http://www.chesscafe.com/text/review570.pdf
Winning Chess Puzzles for Kids, Vol. 2 by Jeff Coakley, and Winning Chess Exercises for Kids by Jeff Coakley.
https://web.archive.org/web/20140708234342/http://www.chesscafe.com/text/review754.pdf
Other possibilities (if interest persists) include:
Simple Attacking Plans by Fred Wilson (2012)
https://web.archive.org/web/20140708090402/http://www.chesscafe.com/text/review874.pdf
https://www.newinchess.com/Shop/Images/Pdfs/7192.pdf
Logical Chess: Move by Move by Irving Chernev (1957)
https://web.archive.org/web/20140708104437/http://www.chesscafe.com/text/logichess.pdf
Winning Chess by Irving Chernev and Fred Reinfeld (1949)
https://web.archive.org/web/20140708093415/http://www.chesscafe.com/text/review919.pdf
Discovering Chess Openings by GM John Emms (2006)
https://web.archive.org/web/20140627114655/http://www.chesscafe.com/text/hansen91.pdf
Chess Endgames for Kids by Karsten Müller (2015)
https://chessbookreviews.wordpress.com/tag/chess-endgames-for-kids/
http://www.gambitbooks.com/pdfs/Chess_Endgames_for_Kids.pdf
A Guide to Chess Improvement by Dan Heisman (2010)
https://web.archive.org/web/20140708105628/http://www.chesscafe.com/text/review781.pdf
Journey to the Chess Kingdom by GM Yuri Averbakh and Mikhail Beilin
https://www.chess.com/blog/Natalia_Pogonina/book-review-quotjourney-to-the-chess-kingdomquot