Showing posts with label NaturalScience. Show all posts
Showing posts with label NaturalScience. Show all posts

Thursday, July 23, 2015

Monday, June 29, 2015

Big relieve.....

A few weeks ago we found this mysterious thing while gardening, which we figured out in the internet was the cocoon of an owlet moth....
We prepared a jar following a instruction from the internet and placed the cocoon inside....we waited ever since and nothing seemed to happen....
When I started to worry that we damaged the poor little thing...all the sudden....a beautiful moth was sitting in the jar. :-)
After the wings were dried we released it, very relieved everything turned out to by alright ;-)


Monday, June 15, 2015

Da Vinci in Hamburg/Germany

One afternoon last week we took the chance and visited an exhibition about the great Leonardo Da Vinci.

The exhibition was smaller than expected, but there were a very interesting section with decent models of Da Vincis mechanical inventions, which the children (and the adults) were allowed to try out.
Friedrich already had some experiences with the Da-Vinci-Bridge and both children picked up the ideas behind the other mechanical principals easily in a playful way. The insight that many of these inventions are still used on a daily basis like chain drive in a bicycles or pulleys, was definitely what they took home.

Other sections showed his live, his way of painting and investigating nature by drawing.

The exhibition gave us a good overview about live and meaning of this multitalented artist.


Tuesday, June 9, 2015

Da-Vinci-Bridge

Yesterday came home from school enthusiastically talking about the handicrafts lessons.
They built a bridge completely supporting itself without any mounting material following an idea of the great Leonardo Da Vinci ...Over the whole afternoon and even this morning before breakfast he rebuilt this kind of bridge using popsicle sticks....no worries anymore, if we would have to pass a  torrential river ;-)


Wednesday, June 3, 2015

Friday, May 8, 2015

Saturday, May 2, 2015

We built a hygrometer :-)

Friedrich wanted a hygrometer....to tell the truth he wanted one for his violin case like his teacher has.....the next best thing is to have one in the garden.....

I found a construction plan in the internet and we gave it a try...

First we put some cardboard in contact paper to make it water resistent.
Next step was to push a fixing pin through one end of a straw. We used the pin to fix the straw at the cardboard. That will be our cursor.
On the back end of this cursor we glues one of Magdalena's hair, she washed with soap before.
The other end of the hair was glued to a pin that was about 15 cm beneath the first pin.

The idea is: If it is raining and humidity is high, that hair will get longer by taking up some water and the pull on the cursor will be relaxed and it will show downwards.
If it is dry and sunny outside, the hair will shorten, since it will lose water and the cursor will be pulled upwards....

So far we had only rainy days... the prove that all this works has to wait for the sun ;-)



Friday, May 1, 2015

Friedrich's new project

Friedrich and I spent some time in garden yesterday.
I asked him for a change not to fill the sandbox till the upper edge with water like he did all the other days and he soon came up with a new project: He dug out all the tree saplings he could find in our garden and put them into plant pots to open his own tree nursery.
After he captured all the saplings in our garden, he went over to our very friendly neighbor asking for saplings from her garden....

Now he has a very nice collection of several linden trees, some beech trees, one or two maples, a mahonia and one horse chestnut :-)


Friday, April 24, 2015

Children Craft's: Nature prints

Once I saw this technique of printing nature structures in clay on Jean Van't Hul inspiring website The Artful Parent I know we have to try that out ourselves.

It was a fun project from the very beginning :-)
First we went for a walk in the neighborhood and collected plants we assumed to be suitable.

We used air drying  clay instead of sculpey, which worked perfect.

We first formed clay balls, put them on top of one leave or flower and pressed down with even pressure. Before lifting the pieces, we tried to smoothen the rims with a wet finger.

The result was so amazing, because even tiny details can be seen in the clay print. Some pollen stick to the clay giving some color to it, what is fine with us.
Some leaves appear dirtier than we realized before, but we simply washed them and tried again.

After the clay parts were dried, the children mounted them on a black wood panel.
I wrote the names under each piece using silver permanent marker to give it kind of a scientific outlook ;-)

It was so much fun we already think of what to print next....may be shells would work nicely as well.....we will keep you informed :-)


Please meet Audrey....

Maybe she is just a plant, but to the children she is almost a family member already, carefully fed and spoken to everyday :-)

Although her official name is Dionaea muscipula, we call her Audrey in homage to a certain plant staring in the musical "Little Shop of Horrors" :-))


Tuesday, April 21, 2015

Insect Hotel

We have one!! I always wanted to build one, but positively refrained from buying all the material necessary to build the house in the first place.

But...while searching for something completely different in the cellar, I found our old chute rack (I hope that is what you would call it in English...). And that turned out to be perfect!

We collected all kind of dry natural materials in the garden and filled every chamber differently.

Now we are just waiting for the first guest, who like to find shelter through out the whole year :-)


Weather Station

I guess every child is more or less fascinated by the weather and how to predict it.
Last weekend we took the chance to set up our own little weather station.

First we built a barometer to see changes in air pressure.
We tautened the wider part of a balloon over an empty jar. On this membrane we fixed a straw with a pice of tape.
We then positioned this barometer infant of a little wall on our terrace where we fixed a laminated white pice of paper. The straw has to point directly on this paper. To make sure, that the jar is not shifting we fixed it with an power strip.
The position of the straw is marked on the paper with a permanent marker. Overtime the air pressure rises, the straw will went up since the membrane is impressed. When the air pressure get lower than the pressure inside the jar, the membrane will vault and the straw will went down.
So far so good, now we only have to observe carefully and see whether we can bring the changing of the straw position in connection with actual weather changes.


Monday, April 20, 2015

Monday, March 30, 2015

Closed ecological system

One of our little science projects with the children was to build a closed ecological system, which means that once it is set up, nothing goes in or out.
We took sand, some water plants and one (!) water snail, put all in a glass jar and closed the lid safely. We placed it on the window sill for enough sunlight over the radiator for good temperature.....
Actually we soon figured out that TinkyWinky, our snail, has a little companion.... At first we worried for overpopulation, but since it is still the two of them, we are quite sure, that they are of different race and the second snail, which the children named Little Tinky, came with the plants....
Anyway, I never would have anticipated the system to work so nicely...but it is running now for four or five weeks, the water is clear, the inhabitant seem busy and lively and the plants grown in a reasonable way :-)
Although TinkyWinky and Little Tinky live in their own world, they somehow belong to the family by now :-)

Btw: No need to worry, in case anything goes wrong, we have an evacuation plan for them....