For your convenience here are the links from this session:

Inexpensive Ideas and material for home made Greenhouse:

http://www.northerngreenhouse.com

http://www.homedepot.com/p/Coroplast-48-in-x-96-in-x-0-157-in-White-Corrugated-Plastic-Sheet-CP4896S/205351385

Fancy Greenhouse:

http://www.greenhousescanada.com