Useful Links

Here are some links for your reference:

http://www.knex.com/
You can find a lot model of construction and building blocks in this website.

http://www.lego.com/
LEGO official website.

http://www.kevaplanks.com/
This is the official site of KEVA planks, a wooden blocks manufacturer.

http://www.kaplaus.com/
You can find more information about Kapla construction box and building blocks