Keeping kids busy, entertained and intellectually engaged in the summer can be a challenge for any parent, especially as the summer winds down and many ideas have already been used up.

Fortunately, Fort Wayne’s Science Central and the internet provide several easy science experiments to teach children about various topics while giving them something fun to do in the same time.

For more summer science experiments for kids, visit //lemonlimeadventures.com/must-try-summer-science-activities-for-kids/ or do an internet search for easy science experiments for kids.

Fizzing Ice Cubes
Experiment idea from LemonLimeAdventures.com

Items needed:
• Baking soda
• Water
• Ice cube tray
• Vinegar

Instructions:
Mix baking soda, water and food coloring together. Freeze.
Pour vinegar into a container and drop baking soda ice cubes into the vinegar or pour vinegar over ice cubes.

How does it work?
The fizzing and bubbles come from carbon dioxide, which is created by the acidic vinegar and basic baking soda combining.


Rainbow Bubble Snakes
Experiment from HousingAForest.com via LemonLimeAdventures.com

Items needed:
• Empty water bottle
• Duct tape
• Single sock
• Dish soap
• Food coloring

Instructions:
Cut off the bottom of the water bottle.
Slide the sock over the bottom of the bottle. Use duct tape to secure the sock on the bottle.
Pour dish soap into a shallow container with a little bit of water and gently mix.
Dip the sock-covered end of the bottle into the solution and gently blow (do not inhale).
Food coloring can be added into either the sock or the dishwashing solution.

How does it work?
Bubbles form because of surface tension of water — hydrogen atoms in one water molecule are attracted to the oxygen atoms in another. In bubbles, these enclose a burst of air.
When you use a bubble snake, you create hundreds of tiny bubbles.


The Leak-proof Bag
Experiment from Science Central

Items needed:
• Sharpened pencils (the sharper the better)
• Zipper-lock plastic bags
• Water
• Paper towels

Instructions:
Fill the zipper-lock bag between half and ¾ full with water.
Hold the pencil in one hand and the top of the bag in the other hand. Slowly but firmly, push one of the sharpened pencils through one side of the bag. Push the pencil through the other side of the bag. Do not push the pencil all the way through either side of the bag — as soon as the eraser gets past the bag water will spill out of the bag.
Repeat with other sharpened pencils.
Once you’re finished, hold the bag over a sink and remove the pencils. The water will come pouring out of the holes.

How does it work?
Plastic bags are made of polymers, long chains of individual molecules. When you puncture the bags with a sharp pencil, you separate the polymer chains without breaking them. The long chains of molecules then squeeze in tight around the surface of the pencil, preventing a leak.


Thaumatropes
Experiment from Science Central

Items needed:
• Thaumatrope pattern printed on cardstock
• Scissors
• Tape
• Unsharpened pencil

Instructions:
Cut out thaumtrope pattern.
Tape the right edge of one piece to the right edge of the other.
Put the pencil in between the two pictures and tape the other two edges together so they sandwich the pencil.
Add tape to the tops and bottoms of the pictures to fasten them to the pencil with the thaumatrope near the top of the pencil.
Hold the pencil between your hands and spin it very quickly back and forth. You should see the pictures combine.

How does it work?
Thaumatropes work due to the persistence of vision. Our eyes and brain keep an impression of an image for a fraction of a second. Because the image is changing so rapidly, our eyes and brain combine it into one image.


Magic Colored Milk
Experiment from Science Central

Items needed:
• Petri or shallow dish
• Milk
• Food coloring in three different colors
• Dishwashing detergent
• Eyedropper

Instructions:
Pour enough milk into a petri dish to cover the bottom.
Drop one drop of each food coloring onto the milk in three different locations.
Use the eyedropper to squirt a small amount of dishwashing detergent into the milk.
Don’t stir the milk; it isn’t necessary. The colors will swirl on their own as soon as the detergent contacts the liquid.

How does it work?
Milk consists of a lot of different molecules: fats, proteins, sugars, vitamins and minerals. When you introduce detergent to the milk, several things happen at once:
The detergent lowers the surface tension of the liquid so that the food coloring is free to flow throughout the milk.
The detergent reacts with the protein in the milk, altering the shape of those molecules and setting them in motion.
The reaction between the detergent and the fat forms micelles. As the micelles form, the pigments in the food coloring get pushed around. Eventually equilibrium is reached, but the swirling of the colors continues for quite a while before stopping.