Google Chrome has an interesting ”workshop” called Chrome Music Lab with several different ways of viewing and tweaking sound.

Objective: Recognize visual speech patterns; compare numbers to determine the larger value and associate number names, quantities and written numbers.

Materials: Cards with different ways of representing numbers, such as numbers, dots, dice, shapes, etc.

Number of players: 2

Instructions:

1. Divide the cards evenly and place them face up in a pile in front of them.
2. The game is played in rounds. In each round:
   a. Turn the card over and say the number on the card.
   b. Players compare the numbers to see who has the highest value.
   c. The player with the highest value ”catches” the other card and places it on a rubbish heap.
   When all cards are played, players count their cards in the rubbish pile. This step can be skipped if you want to avoid the competition situation.

Variant:

• The players compare cards and the player with the lowest value wins the round.
• Play add-catch with two cards and the one with the highest amount wins the round.

Procedure

1. Cover both of your hands in paint, as if you were using hand lotion. Make sure to cover the backs of your hands, in between your fingers, and around your fingernails.
2. Hold your hands out and let the paint dry for a three or four minutes.
3. Rinse your hands briefly with just warm water. How much paint is left on your hands?
4. Rub your hands together briefly under running water. How much paint is left on your hands now?
5. Use some soap, and count to 5 while washing your hands. Now how much paint is left?
6. Continue to use soap, and wash your hands for another 15 seconds. Examine your hands.

Are certain parts of your hands cleaner than others? Where is there still paint left on your hands? What can you do to improve your hand washing?

What Happened?

You probably found that rinsing, or even scrubbing, your hands with only water did a poor job of removing the paint. Soap helps break up the paint and other dirt on your hands, making it easier to remove, along with germs. But even with soap, you have to do a good job washing your hands to remove all the paint. This includes washing them for more than just a few seconds, and getting into all the nooks and crannies where the paint (and germs) can hide.

Let one child at a time close their eyes, shake the container near one ear, the other ear, or at the neck of the child. Ask the child to tell you where the sound came from!
It is important that the rest of the group of children is as quiet as they can when performing this experiment, otherwise it will be difficult to hear the Sound!

Is sound heard everywhere?
Sound is conducted differently in different materials. That sound is heard even under water, you learn that when you dare to have your ears below the water surface, but that phenomenon can also be detected through a plastic container.
Ask the children (one at a time) to put one ear against a wooden object, and hold the other ear shut. Tap the wooden object lightly with the pen. Can it be heard? Continue with the other materials.
The children who dare, can lower their ears below the water surface in the pool if you bathe, then you tap with the pen against the pool edge.