The following are links to different websites with resources (online & printable) to develop critical thinking, logical analysis, problem solving and lateral thinking skills for children.
http://www.jumpstart.com/parents/activities/critical-thinking-activities
http://media.rd.com/rd/images/rdc/PDFs/brainteasers.pdf
http://www.bestofthereader.ca/Ebooks/Word_Games_and_Puzzles.pdf
http://www.teach-nology.com/worksheets/critical_thinking/
http://www.arvindguptatoys.com/arvindgupta/challengingpuzzles.pdf
https://www.brainbashers.com/logic.asp
http://www.statusofwomen.nt.ca/pdf/Conference/presentations/brain%20questions.pdf
http://www.kidsmathgamesonline.com/problemsolving.html
https://www.langevin.com/train/bin/postcards/12_fun_brainteasers.pdf
http://www.uteed.net/files/501ChallengingLogicandReasoningProblems2ndEdition.pdf
http://www.printable-puzzles.com/printable-logic-puzzles.php
http://home.pilsfree.net/tonny/lateralthinking.pdf
http://sspw.dpi.wi.gov/sites/default/files/imce/sspw/pdf/sascevanshandouts.pdf