Cool Science Experiments For Kids This site contains some science experiments for kids to do @home or school
  • scissors
    November 10th, 2009CTForce

    Yo, kids. Is Cool Science Experiments For Kids again.

    This time around we gonna go through walls…

    Hello…, doc. How can you going through the wall…!!! This ain’t no magic.

    No worries guys. This is pure science. I will explain it later, But now, is better to get our hands dirty.

    Let’s prepare the material for this experiment:-
    a) a marble, if you wanna have more fun then a few
    b) a coin make it is big enough to cover the mouth of the bottle
    c) a piece of paper (11cm x 30cm)
    d) a soda bottle
    e) a cellophane tape

    Just follow these steps:-
    1. Roll the piece of paper, use the cellophane tape to make sure it holds. Now, we will have a 30cm tall cylinder shape paper roll.
    2. Put the coin on the mouth of the soda bottle.
    3. Next, we put the paper onto the mouth of the soda bottle.
    4. The moment of truth, put the marble on top of the paper roll and let it fall…
    Can the marble fell into the soda bottle ? 😉
    5. What happen?… Something strange ? (Yes, the marble went in the bottle)

    Newton’s Third Law states that:
    If object A exerts a force on object B, then object B will exert an equal but opposite force on object A.

    Or like your teacher always say

    “To every action there is an equal but opposite reaction”

    In this experiments, when our marble hits the coin, the coin will produce any equal but opposite reaction/foce onto the marble, making the marble bounce back. The hitting force on the marble will causes the coin to temporary leaving the mouth of soda bottle. Thus, resulting the morble fell into the soda bottle.

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  • scissors
    October 29th, 2009CTForce

    Phew… It really nice to be back after all the work in school.

    Hi, Kids. Do you like magic ?

    Last Saturday my school organized a fair for the whole school.

    So, I found out this very interesting experiments for you guys. But, during the event this magician keep saying is magic time. Well, I say……”It Cool Science Experiments For Kids Time…!!!”

    Let’s start the experiments will the following materials:-
    a) a stripe of manila card size: (1.5cm x 30cm) (just ask dad to get it from his office ;))
    b)a coin
    c)a cellophane tape and
    d)a glass

    First, use the cellophane tape to stick the two end of the manila card. Becareful, don’t use too much force as we want a round shape paper ring.

    Then, put the paper on the mouth of the glass.

    Lastly, put the coin on the top of the paper ring.

    Now, is ‘SHOW TIME’… Use tip of your finger quicky pull away the paper ring.

    What happen? Why?

    Guys, haven’t touch up the pictures yet. Coming Soon….

    According to Newton First Law,

    An object tends to stay at rest and a moving object tends to continue moving with same speed and in same direction unless being acted by an external force

    The coin is under the force of gravity, and tends to be pull downward. When the paper ring was being pull away at a fast pace, the coins will tends to fall down into the glass rather than pull away by the ring.

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  • scissors
    March 7th, 2009CTForce

    Kids, try recall this… You wake up in the morning and go to kitchen for breakfast. Eggs are on the table and you always yell to your mum asking which is cooked ? Sounds familiar…?

    Now, I gonna tell your a trick to differentiate the cooked (hard boiled) and the raw egg.

    Well, the answer is fairly simple : SPIN IT!!!

    The hard boiled egg is easy to spin and can be stoped instantly (with your fingers off course). The raw will be shaking around and can’t be spin at all but after you get it to spin, it will spin again after you have stopped it.


    A hard boiled eggs is cooked and it is solid inside which means the egg white and egg yolk is in solid form. While, the raw egg is uncooked and there is liquid floating around in the egg.

    Kids, concept here is Inertia!!! (will discuss more in later post)

    Inertia cause the yolk in the uncooked egg to spin slowly or can’t start spinning when we try spin it. Later when we want to stop it from spinning,  the moving liquid in the egg keep on spinning making it spinning again if we move our fingers away.

    As for the cooked egg, the solid inside the egg spins together with the shell. Thus, we have little problem in spinning it.

    So, no more Hard Boiled Egg vs Raw Egg every morning!

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