My tomato babies are about a week old. I keep them inside on top of the dryer until they germinate, then they need to go outside. Every time I have tried to keep them in a bright window they stretched and did not do well. I have a big greenhouse, but it is a few miles away and I just don't feel like going there everyday to take care of seedlings. What I needed was a little mini greenhouse. I did an Internet search and found mini greenhouses using soda bottles, a lot of little hoop houses, and something made out of plastic and cardboard. Then I looked to might right. There were my plastic containers for my fabric. The light came on. I went to the dollar store and bought an inexpensive opaque container.
Put the lid down and put the seed trays on it.
Put the bottom on as the top and lock in place. I put a rock on top of it just in case we have high winds. On very warm days, I will take the bottom-top off and let them into natural light. If it threatens to freeze, I will bring the whole thing inside. This should keep my tomatoes from getting too leggy and acclimate them to the temperatures outside.
I would love to hear any gardening tricks you have up your sleeve:)