Here are the directions you can use as your guidelines on how to grow some seedlings:
Cut slits in the bottom of the dixie cups with a knife so the water can drain
Fill the dixie cups up 3/4 of the way with dirt (or potting soil if you want to be fancy).
Place the seed on top of the soil.
Place the cups into the plastic container
Spray with a gentle mist (and with warm water). I recommend watering twice a day.
Place the other plastic container on top of the other one. Make sure it is not airtight, but also that condensation can form
Place contraption in sun