Over the years ever since the late seventies, I have had often purchased and collected a plethora of brain teasers and mind flexors, in addition to construction kits like Googolplex, K'Nex, Zometools, etc., especially during my overseas trips.

Prior to my relocation to Vietnam in 2010, I have had in fact given away a lot of them to relatives and friends, but I still hold quite a lot of them.

This is just one of them, a wooden tangram puzzle.

I always love to play with them during my mental timeouts!