Growing cress/mustard in egg shells

              Plants need water, air and sunlight to grow. Did you know they can grow without soil? You can make your own cress head to prove this! Experiment using a homemade greenhouse to see if a greenhouse helps the cress to grow.

What you need:
Cress/mustard seeds
Two eggs
Kitchen roll
Cotton wool
Felt tips or paint
Clear plastic drinks bottle
Scissors

How to grow:
             If you're using eggs, boil the eggs until they're hard boiled. Take the tops off gently. You can eat the boiled eggs - yummy! Clean the inside of the eggs gently, so they don't break.
Draw a face on the egg shells using felt tips or paints.
When the paint has dried, wet some kitchen roll and put it in the bottom of the egg shells.
Wet some cotton wool and put it on top of the kitchen paper. Make sure there is a gap between the cotton wool and the top of the egg shells.
Put some cress seeds on the cotton wool and press them down gently.
Put your egg shells or pot in a sunny, warm spot - try a kitchen windowsill.
You can make a greenhouse to put over one of the egg shells. Ask an adult to cut the top off a plastic drinks bottle. Put the bottom half of the drinks bottle over the top of one egg shell. The inside of your greenhouse will be warm and damp.