Category Archives: Juguetes

Juguetes

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)

Royal Game of Ur

 

 

The Royal Game of Ur is one of the oldest known, next to the Egyptian game of Senet. Also called “game of 20 squares” and it was played in Mesopotamia in 2600 BC It is a game for two players, each with seven tiles (black and white) and three pyramidal dice.

The board and pieces are based on the tablets found in the city of Ur, one of the most important cities of ancient Mesopotamia during the excavations in the 1920s by British archaeologist Leonard Woolley. Excavations continued until 1934 and there were found sixteen graves they called the “Royal Tombs of Ur”.

The pieces found, (one of them is preserved today in the British Museum) consist on a wooden board with inlaid shell, red limestone and lapislazuli, small shell discs and three pyramidal dice, marked in two of its vertices.

The twenty boxes are decorated with various designs, symmetrically distributed.

All different similar boards  found, have in the same position the five rosettes, so they are considered special boxes. Other tables are decorated with “eyes of luck” points and concentric circles.

The original rules of the game are unknown but there are several possible reconstructions based on a clay tablet with cuneiform writing (Babylonian origin of 177-176 BC) that suggests that it was a “persecution” game as Senet, predecessor of today Parcheesi and backgammon.

The two players move their pieces across the board according to their score on the dice.

Here we expose one of the versions, based on the interpretation of the British Museum:

Objective:

Complete the tour with seven tiles before your opponent

How to play:

The score of the dice according to the number of vertices labeled as follows:

– An unmarked vertex: One point, the turn passes to the opponent.

– Two unmarked vertices: Zero points, the turn passes to the opponent.

– Three unmarked vertices: Four points, and roll again.

– Three sharp corners: Five points, and roll again

With the first roll of the dice we resolve who starts the game.

A chip on the board enters the input box if we get a roll of 4 or 5 points.

Once on board, the chips make their journey according to the score of the dice.

When the chips are in the middle row can be attacked if an opponent’s piece falls into the same box, so that the attacked piece will be removed from the board  to start again.

The rosette boxes are safe squares rosette, the chips are in a rosette can not be attacked.

To exit the panel a piece has to fall exactly at exit square, If the score is larger, travel in the opposite direction to completion, once there, the tab will travel when I get a score of 4 or 5.

Long version:

Once in the exit box, we turn to the piece and follow the dash in reverse, to finish the tour of the input box. In this game mode, the chips may only be attacked by other going in the same direction.

We present here our interpretation of the board and pieces.

This is a reproduction hand painted resin.

It comes in a matching wooden box, with compartments for the different pieces.

Wooden box is not available now.

Available in our store.

Magic Cube

We are opening a new category: “Toys” with something we did out of curiosity, (which is our weakness), a few years ago, when came to our hands a puzzle. Well, It is not really a puzzle, because one must not think anything, just manipulate it, so that in a curious way they appear images. Generally we have seen as a funny advertising medium and it was fun to see how we could build one.

In this case I decided to personalize it with images of my town, Villavieja Yeltes in the province of Salamanca (Spain), and the truth is that it was quite successful among my countrymen that year.

[youtube]http://www.youtube.com/watch?v=eMS0qyG4c0Q[/youtube]

So much so we finally made some of them personalized as a gift for a birthday and a wedding.

It is built with blocks of wood, laser prints with a good resolution and laminated to prevent spoilage with use.

Following this toy, I studied the Kaleidocycle, a rotating object created with paper, rather curious. Starting with a flat surface (a sheet) folded in a certain way, you can turn on itself showing the different faces. The truth is that when we made it, I spent hours turning over and around. You can learn more about them here

[youtube]http://www.youtube.com/watch?v=NF8Pxop_RFM[/youtube]

According to the Wikipedia article, the cube we have shown at the beginning of this post is also a variety of kaleidocycle, reading it, I’ve discovered this Yoshimoto cube (coming soon…)

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

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