Dh would love a greenhouse. We really really can't afford it this year. Last year he bought a sort of green house (it was green fabric!) from poundies for £30 but it blew away after a few months! However in that time dh and ds really enjoyed planting seeds and watering them and talking to them every evening. Both are v keen to do similar again. I've seen tunnel things and cold frames that'd be a lot cheaper than a green house. Are they any good? any suggestions?