Rainbow Celery

This experiment is pretty awesome. Rainbow celery  is a fun visual experiment to show children how plants absorb water through their roots through a process called Osmosis.

Select the shorter sticks of celery that has lots of leaves for the best results. Chop around a cm off the bottom (the bit that is white) and place them in a glass with water and food dye.  I have found that blue and red seem to work the best. Over the next 24 hours we observed the colour of the leaves.

1hr later

One hour later and we can already see a tinge of blue on the tips of the leaves.

2hrs later