Sid The Science Kid: Growing Plants takes a look into a preschool classroom or daycare as kids plant and compare lima bean plants. This short video shows kids how to plant a seed. The kids then take a look at plants grown from seeds, started at various times in the past; some are seedlings and others are almost a foot tall.
If you are looking to do something inside with your kids when you actually want to be outside in the garden, starting plants on a sunny window sill is a fun activity. Sometimes it works, sometimes it does not. Gardening is always an adventure.