If anyone's interested, there's some smallish softsided greenhouses and shelters on sale at woot, including ones for kids - not bad prices IMO. Cheap enough to put up and take down early in the season. May not survive in the more northern climes tho....
http://tools.woot.com/offers/walk-in...elf-greenhouse
is an example. It says it's only 27 pounds in all. Might need weighiing down with plants!
I'm not affiliated with Woot other than a customer.
Regards.