Here is Day 3, time to put them out in the light on the window sill. Keep top part on always and just slightly askew to let airflow as well as open at the very top. Your tomatoes will love you for this little greenhouse and you will see them happily grow daily.
You will see the little seed cover still on the tips, don't be tempted to remove them, as it will destroy your plant if you try to. They will fall off on their own, do not worry.