From Colleen (USA)

Materials:

• Plastic 2 liter soda bottle
  
• Very sharp scissors or craft knife
  
• Dirt or potting soil
  
• Seeds
  
• Water

Directions:

Remove the label from the bottle. Discard the label but save the cap! Wash and rinse out the bottle and cap. Cut the bottle close to the bottom, near the end of the label, for example. Lightly place dirt or potting soil in the base. Plant a few seeds in the dirt. Lightly water. Put the cap on the bottle . Cover the base with the top of the bottle. You may have to fiddle with it a bit for it to fit back inside of the base. Place in a sunny spot and wait for your seeds to grow. When the plants are ready, repot them or plant them in your garden.

Tip:

If you can find any brand of 2 liter soda that has the black plastic removable bottom, then the project is much simpler. Pry the black bottom off of the 2 liter bottle. Place black electrical tape over any holes it may have in it. Cut the top off the 2 liter bottle down to where the sides are straight. Fill the black base with dirt and seeds, then invert the bottle over the base.