The simplest and most effective plant cell structure experiments use celery!

I will post two links to roughly the same experiment but both are good, with pics to help and a bit of explanatory text about cell walls and water uptake in plants.

You use celery for lots of reasons:
1. the cells are big :) and you can see a fair bit of detail with the naked eye, especially when you soak a stem in colored water.

2. If you are using a microscope then you get wonderfully clear slides - stained well they show every little detail ....

3. Its easy to get and you can use it fresh or a bit old

4. the bits you don't use you can eat ( after the lesson and washing hands etc hehehe )
Source(s):
http://www3.nsta.org/main/news/stories/science_and_children.php?news_story_...
http://100digits.com/blog/?cat=100

and ...experience :)

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