A pot of fairy dust

Since I heard that Tinker Bell was described by Barrie as a fairy who mended pots and kettles, like an actual tinker, I have more sympathy for her and I admit I’ve seen all his movies almost in one day.

As we all know, Tinker Bell and other fairies need “fairy dust” to fly.

The craft that I propose today is done in a few minutes, the idea came up to me yesterday when I saw a toy of my nieces Angela and Julia (nieces of Miguel) and today I could not resist the temptation to try it.

The toy is a black light flashlight, I think it came with a doll who changes her hair color. In any case, if you don’t find something like that you can buy a black light bulb in a hardware store.

“A black light, also referred to as a UV-A lightWood’s lamp, or simply ultraviolet light, is a lamp which emits long wave (UV-A) ultraviolet light and not much visible light”  (Wikipedia)

We will also need a highlighter pen, I have used a yellow one because it seemed closer to the color of fairy dust, baby oil (really any oil, but baby oil is usually transparent) and of course a clear jar that we like . (It is important that it closes tightly to prevent catastrophes).

material

The fluorescent highlighter ink glows when illuminated with black light, so we will take advantage on that and that water and oil do not mix, so that the ink inside the jar will make very small balls but not just dissolve.

rotuThe only complication we have with this is to extract the ink. As far as I know there are two types of markers. Those with liquid ink in a cartridge which is what I used because it was more concentrated (one Pilot in my case) have difficulty drilling into the cartridge without spilling. I did it with a screwdriver after removing all detachable.

manoThe other case is that of the normal markers, which have an impregnated cotton inside. In that case, all we have to do is put it under the faucet with a bowl underneath to catch the stained water . We can also is to put the cotton directly into the water and squeeze… but I warn you that it’s going to happen something like this in your hands. Well, whatever you do, it will surely occur. As mentioned, water and oil do not mix, so by putting the ink into the jar full of oil will get something like this:

tinta

Shake and ready. We have a jar with floating fairy dust.

tarro

tarro3

tarro2

I made a mini video but, in the dark, the effect does not look too good.
I like it better in live.

[youtube]http://www.youtube.com/watch?v=bItnOZOoYNg[/youtube]

P.S. A side effect that I had not calculated that … Maybe one of our little fairies (or pixies) want to sprinkle a little to fly ….

Leonardo’s freestanding bridge

Here’s a quick craft to spend the afternoon and if you Seize children to enjoy learning, there is no question of giving them a kind of strength of materials …. but something remains.

Browsing as usual on the internet, and as usual, looking for something else, I went to give this blog a technology teacher:

http://pelandintecno.blogspot.com.es/2013/01/puente-autoportante-de-leonardo-da.html

Our compliments to the author of this blog, I wish all teachers (thankfully we know many cases) cared so much for making children understand the concepts of such an interesting way.

The bridge in question designed by Leonardo da Vinci, appears in Codex Atlanticus, Volume 1. pages 69r and 71v. (1483 – 1518  Ambrosian library in Milan). It is a bridge designed for war, lightweight, whose main characteristic is that it holds only for the charge distribution sleepers enter ingeniously fitted together, without ties or nails.

This is the picture that has come down to us:pl (Large)

Here’s a drawing with the necessary parts:

piezas (Large)

sierra (Large)I used two strips of circular section 12 and 6 mm in diameter. To make the holes I used the circular saw blade placing 6 mm space that it might be necessary for the “rungs” without cutting the whole piece.

 

 

palitos (Large)Although it’s relatively simple, in the case of using all the slats cylindrical We must be careful to cut at diametrically opposite points, because if we deviate, the pieces will not fit, so it would be easier to start with the pieces that make of “legs” are of square section. They can be cut with hacksaw and retouch them with a file.
In my case I used the circular machine, to make it faster

 

Here a sketch of the assembly:

montaje (Large)

I have to apologize for the quality of the photos, at first I did this as a personal entertainment and not properly documented.

And the bridge assembled:

pl4 (Large)

Later I decided to make it with all the pieces of the same diameter because it seemed a more elegant solution. In this case we can not make the cuts deep enough to fit the whole cross parts, only a half, so that besides being a clever example of load distribution becomes a fun pastime when mounting, as a house of cards.

puente leonardo con palitos (Large)

Leonardo designed the bridge for war, as it was easy to assemble and take advantage of the surprise element. For us it is a toy that helps us to exercise our manual skills and our patience.

A friend who wanted to do it with her toddler that is too young to use saws (apart from that we don’t have wooden sticks at home every day), She wondered if we could make it with soda straws. So here you see that its possible, so there is no excuse for making it and have a fun time. (I made Cuts to fit the “steps” with scissors and V-shaped).

.puente leonardo con pajitas (Large)

Custom railway stock cars.

Today I will talk about our time like model makers, but this time in the second stage, the railway modellers in Trenes y Maquetas SL (TREYMA). Between model and model, when there was not a large workload, we searched a way to solve the problems we have had in the last model made or how to optimize the way we do it.

Nasa STS
Nasa STS

The acquisition of new machines also made ​​us having to become familiar with them and learn their operation to extract all the performance possible. Well, if we add some extra time, problem solving and the new machine, the result is the customization of wagons, locomotives, etc..

One day, we were commissioned to make a model that, although it was not large in size, it  required many repetitions and it had stickers that needed to be cut. Hence we decided to buy a vinyl cutter.

The plotter we bought was Secabo C30 III, which had a laser positioning system, which allows you, once printed whatever you want to cut in the printer, place it for cutting in the plotter, something more than useful when printing and cut decals.

Star Wars
Star Wars

One problem that most bothered me about the theme of the decals was the decals with white background, which were somewhat thicker than the clear ones, and once placed they let see white edges. Also if they were placed somewhere with a dark background it showed a dark shadow. Well, the solution to this problem was to cut the shape of the decal in a vinyl mask, paint the background in white and place there a transparent decal, the result was more than acceptable, it was almost perfect.

As well as model shop, TREYMA was model train store, and we had H0 scale  wagons with which we could test new techniques for painting and labeling of future models.

Thor
Thor

During the post have you seen pictures of some of our customizations. Clicking here you have more photos.

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