If it feels like spring's taking too long to sprout, liven up a winter windowsill by making this mini greenhouse -- a recycled take on a cloche, traditionally used outdoors to protect early plantings.
Consider planting herbs, such as parsley and basil, that can be transplanted outside once the weather warms, or grass, which grows fast and is fun to trim with scissors.
Cut the top from a clear 2-liter soda bottle.
Find a flowerpot that fits inside the dome. Fill the pot with potting soil, then plant the seeds according to the packet directions.
Place the pot on a saucer and poke in a craft stick marker. Slip the dome over the pot. Be sure to water the soil when it looks dry.