Bottle Biome Building Steps

Step 1: Get two one liter bottles, cut one at the 1/4 towards the top. Cut the other bottle 1/4 towards the bottom.

Step 2: Fill 1/4 of the bottle with the bottom half with gravel. Then add water to fill half of the bottle.

Step 3: Poke a hole in the middle of the bottle cap and pull a string of yarn through the hole. The cap should be in the middle of the string of yarn.

Step 4: Screw the cap back on the cut bottle; make sure half of the sting is in and the other half is out.

Step 5: Insert the half of the bottle with the cap and string upside down into the half with the gravel and water. Half of the string should be in the water.

Step 6: Tape this section to secure it close.

Step 7: Add soil and seeds to the section that is still open.

Step 8: Use one of the left over bottoms of the bottles to close the top. Use tape to secure.