Tickling

Tickling is the act of touching a part of a body in a way that causes involuntary twitching movements or laughter.

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Zaid Alsalami, Shaykh Dr Zaid Alsalami is an Iraqi born scholar, raised in Australia. He obtained a BA from Al-Mustafa University, Qom, and an MA from the Islamic College in London. He also obtained a PhD from... Answered 3 years ago

Bismihi ta'ala

There is no problem with tickling your sister, or playing games, as long as it is all halal. 

With prayers for your success.