How high can you grow?

Recently we grew some grass seeds. To make it interesting, we made grass heads (hairy characters). This is how to make a grass head.
Items needed: plastic cup, a pin, soil, grass seeds, funny photo
Method:
Step 1: Tape the funny photo on to the plastic cup.
Step 2: With the pin, poke seven holes in the bottom.

Step 3: Carefully spoon a reasonable amount of soil into your plastic cup (+-3/4 cup).

Step 4: Carefully place your cup on a plastic plate and water the soil.

Step 5: Carefully spoon one spoonful of grass seeds onto your soil.

Step 6: Carefully push your seeds +- 3 centimetre underneath the soil.

Step 7: Place your plate and cup on the bookshelf/ window sill.

Step 8: Remember to water your plant sensibly every day.

Step 9: Hypothesise on how high it might grow and compare the heights of different grass heads.  

Step 10: Take photos to see how the grass/hair grows.

Room 15 JH