Some of your student may not be familiar with an avocado, so this is a great activity to introduce them to something new!
Select a soft, ripe avocado. Peel it and spread on saltine crackers and have them sample it. Show the children the size of the seed inside the fruit. The large size may surprise them.
Wash the pit to remove the brown papery skin and any flesh residue.
Poke three toothpicks evenly around the middle (equator) of the pit. Use those tooth picks to support the pit on the rim of a clear glass or plastic cup with the pointed end up.
Fill the water so that the bottom third of the pit is covered in water. Place the clear glass in a bright, warm location, but out of direct sun. Change the water once a week.
In a few weeks, the pit will split open, the roots will grow out the bottom, and a shoot will emerge from the top.