Science Project for Kindergarten

My daughter did a very simple and effective science project years ago. It's one that almost all ages can understand and explain. Grow beans in several different areas: one on the sunny kitchen counter, one in a dark closet (door closed), one under the bed (dark, but some light), one outdoors. Water them the same. The beans grow quickly and really show the effects of different growing situations. Take a photo of each bean where they're growing about once a week to include in the documentation.

We did an experiment with our granddaughters several years ago that turned out to be a fun experience. The neighbor had workers trim his palm trees and a bunch of the fronds landed in our yard. I kept several of them and we put some in the direct sun and some in shady areas and watched the difference in how they dried out in each area. You could do this with almost any kind of greenery that's been cut.
Another 'accidental' experiment happened when I put some roses in glass bottles in my kitchen window. After the roses fades I neglected to take them out and throw them away. Several months later, I noticed that they were beginning to sprout roots. This might take too long for a young child, but you can probably find other types of plants that would sprout roots from a cutting much more quickly and make a good experiment.

Consumer experiments are always fun and practical. Does the more expensive detergent do a better job? batteries, ball point pens, etc.
I think my daughter did one at that age was whether or not something would float, in water, on oil, between the two. They get to make predictions and then test to see if they're right.

This is a great site:
http://www.sciencekids.co.nz/

My only suggestion is to google easy science projects for kindergarten I bet a ton of things come up. But I bet you also get great ideas from these ladies. The ladies never cease to amaze me!

Have fun!

Great for little kids (and big ones too!) if you don't mind a bit of mess in the kitchen -- make non-newtonian fluid, using conrstarch and water. Is it a solid or a liquid? The consistency changes as you handle it.
http://www.exploratorium.edu/science_explorer/ooze.html