We like the Eco Kids Earth Day Canadian website because it has lot's of exciting challenges and pictures.
It has competitions and an Eco calender. The printable colour in pictures are cool. From this site we have learnt that geothermal energy is the cheapest and renewable which makes it sustainable. The Eco kids earth Canada is for teachers and kids there is lot's of fun activities on the website.
Check it out...
By Leo and Hax