Third graders will be hooked! A collection of science project ideas using everyday materials
For summer vacation independent research, especially for third graders, it’s common to think, “I want to pick an interesting topic, but I don’t want it to be too hard.” Actually, with familiar materials and a little creativity, you can do experiments and crafts packed with scientific discoveries.
Here, we introduce curiosity-sparking ideas like learning about chemical reactions by making bread, observing plant mechanisms with colorful flowers, and reviving a dried-out marker.
Try exciting research and craft projects that will make your friends say, “Awesome!”
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Irresistible for 3rd Graders! A Collection of DIY Science Project Ideas Using Everyday Materials (21–30)
The principle of a Cartesian diver
It’s sure to draw attention! This is an experiment based on the principle of the Cartesian diver.
In it, a dropper placed inside a plastic bottle alternately floats and sinks.
When you show this illusion-like phenomenon, people will be amazed.
The reason it happens is a bit complex, involving the relationship between air volume and pressure.
There are videos that explain it clearly, so check them out! By the way, you can also tweak the experiment by using multiple droppers.
The relationship between bread and sugar
A summer research project you can work on while enjoying delicious food sounds great, doesn’t it? Here’s an experiment that explores the relationship between bread and sugar.
In this experiment, you make several batches of dough that differ only in the amount of sugar, bake the bread, and then compare the results.
Breads with less sugar turn out firm like French bread, while those with more sugar are moist and soft.
Let’s investigate why the outcomes change.
Also, don’t forget to record from which stage in the process the differences begin to appear.
Target-throwing game with disposable chopsticks and clothespins
Let me introduce a target-shooting game that launches with a burst of energy using chopsticks and a clothespin.
Prepare two chopsticks, a clothespin, tape, and a plastic bottle cap to make it.
For the launcher, clip the clothespin’s metal spring onto a chopstick, then tape the clothespin’s handle and the chopstick together to form the base.
Cut a slit in the plastic bottle cap and fasten it to the chopstick with a rubber band.
Make a target out of a milk carton and draw point values on it.
Set a marble-sized ball on the finished launcher and try aiming at the target.
Have fun seeing how many points you can score!
Ocean Bottle
Here’s an ocean bottle idea that will look great as a room decoration.
First, prepare a plastic bottle.
Fill it about one-third of the way with water dyed blue.
Next, pour in baby oil until the bottle is about two-thirds full.
Finally, add shells or other objects of your choice, and it’s complete.
When you shake it, the water and oil recreate the look of waves breaking on the shore.
Making it can stand on its own as a science project, but you could also take it further by researching why water and oil don’t mix.
smart ball
Smart Ball is a playful craft that lets you build your very own game while getting excited about the motion of a rolling marble.
Cut lumber to fit a perforated board to create a frame.
Add an incline beneath the board so the marble rolls more easily.
For the launcher, use nails and rubber bands to make a pull-and-release mechanism that shoots the marble.
Attach a plastic sheet on top of the board to enhance the sound and feel as the marble rolls.
Place small pegs called dowels to add unpredictability to the marble’s path.
With creative targets and decorations, you’ll have a one-of-a-kind original Smart Ball game.
It’s a fun way to nurture creativity and observation skills as you play.
Even grade-schoolers can make it! Triple-shot chopstick rubber band gun
You might think it’s just a simple chopstick rubber band gun, but it actually has a feature that lets you fire three rubber bands.
The building process is straightforward: attach a handle to a bundle of chopsticks that serves as the base, then install a movable trigger so that it’s sandwiched in place.
What’s crucial here are the trigger shape and the positions where the rubber bands are hooked.
By attaching three rubber bands at different positions, they will fire in sequence.
The hooking method for each band is also intricate, so doing that accurately is a key point.
Well-Flying Archery
Here are some craft ideas for making an archery set using scrap materials.
First, make a slightly larger hole in one spot on a toilet paper roll.
Make the same hole on the opposite side, then cut small slits at the top and bottom and hook a rubber band onto them.
Twist the rubber band once so it forms an X shape.
That completes the bow.
For the arrow, use a straw and a ball made from rolled-up tissue.
Cut one end of the straw into a V shape, then attach the ball—rolled and secured with masking tape—to the other end.
With the arrow finished, thread it onto the bow and try shooting it for fun.
