A group of children from the Zayteem (Olive's class) came into the S.T.E.A.M room for the very first time. These three were very curious since they had never been into the room before. We had some discussions of different topics on the things that were in the room. We talked about my tool box and the tools that populated it, when one child mentioned they had a saw at home, but they can't use it. I informed the children that I had a saw and brought it out and showed them I had one to. I asked if they wanted to help me saw some of the wood that I acquired and have been slowly cutting down. Eagerly they said yes! Before we used the saw, we needed to talk about the safety rules when using a saw.
1. Never use/touch a saw without an adult being with you.
2. Keep your hands and fingers away from the sharp part of the saw.
3. Listen to the adult when cutting.
After we went over our rules we picked what looked to be a big piece of wood. We hauled it over to the table and I brought my container to catch the sawdust. Each child was able to get a turn to help push and pull the saw through the wood (while I assisted them in their efforts to cut). We noticed the saw dust coming from the cut pieces of wood falling into the container. After we cut the wood their attention was focused on another tool in the class room.
One child walked over to the set of microscopes and was looking in them. There was a dead cicada laying on the flat surface of it as they were asking "What is this?" and "Is that a real bug?". I let them know that what they were looking at was a very special tool and that the bug was not alive. I asked if they wanted to look at this new device and they did. I set up and area on a table in the room so we could explore this new thing. I gave them a couple minutes to fiddle with the knobs and switches before I asked them if they knew what it was called. They didn't know, so I told them it was called a Stereoscope and we need to use both our eyes to look through it.
|
Exploring Stereoscope |
|
|
Observing the Stereoscope |
|
|
Exploring the Magnifying Knob |
|
After their investigating the stereoscope, I plugged it in and showed them that it had lights on it too. We looked at where the power button was and saw there was a light the turned on from inside the bottom shining up and a light that shined down onto the platform. I asked the children what they thought these stereoscopes where used for. They genuinely were not sure, so I told them that it let us look at things that were very small, l close up. It can be a difficult concept for children to wrap their head around to think of looking at something small close up. I brought over the container when we were sawing wood to catch some sawdust. I picked up the saw dust from the bin and put it on a lid and let the children feel it and look at it.
|
Observation of Sawdust |
They felt it and they all said it feels soft and fluffy as they felt and examined it with their fingers. The saw dust was clumped together and I told them to use their eyes and look carefully at the saw dust and see it they are big or little pieces. They moved the sawdust around and pinched some between their fingers. They came to the conclusion that the pieces were very small. I told them, that is why we have microscopes like the one I showed them so we can look to see what those small pieces look like. I put some of the sawdust on a dark tray and placed it under the stereoscope for them to investigate the difference. Once it was focused and visible through the eye viewers, each child got a chance to look at the sawdust. Some with shocked expression and mouths opening when looking through the eye pieces, one child said "It looks really big!"
Another child said "It looks like to much." After they all got a chance to look at the sawdust, we discussed about it looking "bigger". I said it looks bigger because if you are looking at it close up, its still the same size, but when we look through the eye pieces, its helping us to look at it "up close". I showed them on the front of the stereoscope that there was a number that said "1x". They all identified the number being one. I said as I twisted the black magnifier part that is pointing down at the sawdust around and we saw that a new number showed up. They said "That's the number 3!". It showed as "3x". When I turned it I explained when its on the number 3x, we get to see it even closer now and that it will look "bigger". When we looked through the eye pieces the children were what seemed pretty amazed at the sight. One said "It looks gooey." as another said "It's bigger!"
|
Sawdust Magnification - 1x |
|
|
|
Sawdust Magnification - 3x |
|
After we looked at the sawdust I brought over some sand over on a small plate. We looked at the sand the same way as the sawdust. We explored it by feeling it and making observation of it before looking at it under the stereoscope. We noticed the sand feels very soft as they felt it against their finger tips. As we spread the sand around we made a keen observation that sand is made up of very small pieces. You could see the small little individual specks of sand as it was spread around.
|
Observation of Sand |
|
|
Observation of Sand |
|
We placed the brown tray on the stereoscope platform and adjusted to make it visible again. When the children each got their turn to look into the eye piece, they were pretty amazed at what they saw. They said it looks like little rocks, another child said it looks like small pieces of glass. We observed just like the sawdust, the sand in both 1x and 3x. When looking at it up close one child stated, "It looks like salt." I replied with "Hm, that's an interesting observation lets go get some salt and see if it looks the same or if it looks different than the sand."
|
Sand Magnification - 1x |
|
|
Sand Magnification - 3x |
|
We went to the kitchen in the school and grabbed some salt. We poured it in another small dish and observed it before we looked at it under the stereoscope. Right away we could make some obvious observations from the sand to the salt. We noticed that the salt looked much bigger than the sand pieces. Also when we felt the sandy we noticed it didn't feel as soft as the sand either, it felt "more scratchy". We put the dish under the scope to see what if our observation would really show us the differences.
|
Sand |
|
|
Comparing Sand and Salt |
|
|
Salt |
|
Right away the children could notice and see the difference between the salt and the sand. "It looks like little squares." commented one child. "There is also circle looking ones too" replied another child. Comparisons were being made right away to the shapes, sizes and color of the salt. One child pointed out that the salt looks like white beads. The amazing thing about these observations was my lack of needing to prompt them in their observations. They were making these comparisons between the sand and salt naturally, because they were invested and interested in this experiment.
|
Salt Magnification - 1x |
|
|
Salt Magnification - 3x |
|
As we observed more and looked at the salt under the scope, I asked "Is there something else that is like sand and salt that we could look at?". They thought and one child responded with "sugar is also like sand".We walk back over to the kitchen and got a little bit of sugar brought it back to the class. In our observation before placing under the scope we felt it, like we did with the sand and salt before. We were seeing if it felt or looked different than the sand or salt. One child took notice that the sugar and sand looked whiter than the salt did. We also took note that the sugar didn't feel as scratchy as the salt did, but not as soft as the sand. After our initial observation we placed it under the scope to get a closer look.
|
Sugar Magnification - 1x |
|
|
Sugar Magnification - 3x |
|
Right away they made clear observations that it looked similar to the salt. "They look like little squares" stated one child. "They don't look as big as the salt, but they still look like squares." said another child. It's amazing to watch these children, with a scientific lenses, ask these questions and make these comparisons. Being able to have new experiences like this for them is what opens their minds and unlocks those abilities to ask those questions and critically think about things in general.