We are a small group of entrepreneurs from India and have recently launched two decks of playing cards with Maths and Astronomy as their themes. These cards were crowd funded through an Indiegogo Campaign during 2015 and reached the targeted amount in just a few days of the campaign.
It was widely appreciated and endorsed by noted science folks on social media. It would be great if you can feature these decks on your blog/ website and endorse this venture.
We really believe these are potent educational tools along with being fun, quirky and quite pretty.
In case you would like to get your hands on one of these babies please let us know directly and we would be only too glad to make that happen. 
•   Here is the link to the Campaign Page: https://www.indiegogo.com/projects/edustack-playing-cards-for-math-astronomy#/story 
•   Facebook Page - https://www.facebook.com/mathstack/
•   Some other reviews online
1.   World Of Playing Cards- http://www.wopc.co.uk/india/edustack/
2.   University Express-http://www.universityexpress.co.in/delhiuniversity/2015/06/math-stack/
3.   A Spanish Magazine- http://www.microsiervos.com/archivo/juegos-y-diversion/barajas-naipes-cientificas-matematicas-astronomia.html
A feedback from you would be much appreciated
Regards,
Garima Capoor
Agra, India