Hobbies and intellectual development

If we do not exercise our intelligence, it atrophies.

Daily life presents few options for intellectual development and a good choice are the hobbies.

 From collecting stamps or other, to modeling, or writing a blog that take care not to hang the usual cartelitos figurines and phrases, but choose a topic, research it and write about it.

There are Internet sites that describe hobbies and suggest how to implement them. 

Some addresses: 

http://www.lifespan.com/7-hobbies-will-make-smarter/

http://www.huffingtonpost.com/dennis-kravetz/10-ways-to-boost-your-cognitive-fitness_b_3195153.html

https://en.wikipedia.org/wiki/Hobby