My 'oven' proofed seeds have sprouted. First popped up the marigolds. The beefsteak tomatoes are just emerging. A few petunias are sprouting as well. I have taken off the lid of the paper egg carton and placed the marigolds under a lamp for 'sunshine' and a little warmth. With some birthday money I picked up a patio sized 'greenhouse' with about four shelves and a plastic zippered covering. It needs to be assembled. the shelves are far enough apart to grow stacked trays of lettuce all summer long without using the cover. By placing the growing trays on the shelves, water should trickle down from the first tray and water everything growing on the lower trays.
Photo: style of greenhouse purchased at sprawlmart for $38