Science Buddies: "Ask an Expert"

Hello

My stepson has a project where he must build a greenhouse using recyclable materials. Their initial attempt was not the best. I was wondering if anyone had any ideas on how to build one. He's in the 6th grade. Any help would be appreciated. Thanks

Hi,
What did they use for the first attempt?
Have you thought about using empty plastic bottles? I imagine they could be used for the walls and they would stack pretty easily if cut properly.