Cool Kids Science Experiments - Fruit Battery

This is another one of my favorite kids science experiments. For this one, have your son or daughter begin by rolling a grapefruit or orange on a table so it can get soft. This will also move around the juices inside, but will keep it intact. Once they have done this for a few minutes, insert a two inch galvanized nail and a similar sized copper one into the fruit a couple of inches apart. Make sure you do not penetrate the other side.

Starting to sound better than the other kids science experiments you have researched, right? Ok, now get a Christmas tree light bulb that is about 2 inches long and remove a bit of the insulation from the leads. Attach a lead to each nail with electrical tape. Presto! You will see the impressive light!

What happens is the acid in citrus conducts electricity. You can also try other fruits such as lemons and limes to see if they produce more or less of a charge. This will be evident by the strength of the glow. You can also try different sizes to see how it affects the results. If you have a multimeter, use it to measure the current that is being produced.

There are a whole bunch of kids science experiments, but I know you will have a great time with this one. It also doesn’t cost a lot and will really impress your child’s classmates. As science fair projects go, this one is a winner!

Kids Science Experiments - Making A Cloud

Here is another one of the many kids science experiments you can have fun with. Have your kids every wondered how clouds form? Well, they form when water vapor is cooled just enough to form little bitty water droplets. This is what takes place when wet air rises in to the atmosphere, cools, and then water droplets form into a cloud.

Now you can demonstrate what happens in what is another of my favorite kids science experiments. You will need to gather this for the science fair project:.

1-liter clear plastic bottle with cap

Place just enough warm water in the bottle to cover the bottom. Your goal is to get some smoke into the bottle. Light a match and let it burn on for a few seconds. Blow it out and immediately place the head of it inside. Let all the smoke from the match fill the bottle. After a few seconds, it will seem to disappear, but the invisible particles are still floating around inside. All of this will kind of happen pretty quickly. Screw the cap on being careful not to let too much smoke out.

Squeeze the sides really hard 6 or 7 times. Squeeze it again, hold it for a few seconds and then quickly release. The second you let go, you should see the formation of a little fog in it. This is the cloud!
You may be wondering to yourself how does this work? Well, even though we don't see them, water molecules are in the air all around us it's called water vapor. When the molecules are jumping around in the atmosphere, they don't normally cling to each other.

Pressing the sides forces the molecules to squeeze together or compress. Taking away the pressure allows the air to expand, and when this happens, the temperature of the air becomes cooler. This cooling process allows the molecules to stick together more easily forming tiny droplets and clouds are nothing more than this!
The smoke that is inside the bottle also helps this process. Water particles will stick together much more easily if there are some solid particles in the air to act as a nucleus. I hope you enjoyed this and please take a look at my other kids science experiments.