|
| |
| | |
 | ||||||||
 |  | |||||||
 | ||||||||
 | ||||||||
 | ||||||||
| | | | | | | | |
 | ||||
| | | | |
 | ||||||
 | ||||||
 | ||||||
| | | | | | |
Metamorphs Metamorphs are curious and interesting paper models which will transform step by step through a sequence of different shapes before finally returning to their original starting positions. There are ten colourful two and three-dimensional models to cut out and make and also an informative text which discusses and explains the principles by which they have been designed. There are two main classes of these objects and both are well represented in this collection, together with an introduction to the importance of degrees of freedom and the limitations of hinges and hinge lengths. Some people will prefer to see metamorphs simply as amusing and rather impressive toys, others as expressions of mathematical principles to be understood and appreciated. £5.95 |
A Handbook of Paper Automata Mechanisms This wonderful book by an imaginative designer of automata models shows in a step by step way how to obtain a large number of different kinds of movement using thickish paper as the modelling material. In a clear and well illustrated way it explains how to make use of the properties of levers, drive shafts, gears and cams to obtain smooth, jerky or repetitive motions of different kinds. Also included are five working models to cut out and glue together, which between them demonstrate many of the basic techniques in physical form. If you want to design any kind of moving model, then this is the book for you £6.95 | Sixteen varied and well worked out whole class activities form the heart and the purpose of this collection. The aim is to encourage everyone’s active participation with the teacher directing from the front. For some of the activities the pupils have to respond verbally, for others they have to hold up coloured cards with the words ‘true’ or ‘false’ or the choices ‘A’, ‘B’, ‘C’ or ‘D’ printed on them. Photocopy masters are provided for each of these cards and also of the various forms and charts needed to respond or react to the the situations being set up. Anyone looking for a way of generating enthusiasm and quick responses will find this book most useful. £6.50 | ||||
| | | | | | |
 |
 |
 | ||||
| | | | | | |
Advanced Polyhedra 1 This beautiful model to cut out and glue together has sixty spikes, each with three faces, making 180 faces in all. It is coloured in twenty different colours each of which defines a plane surface and which is represented by nine faces. Looked at another way it has twelve clusters of five spikes showing the relationship with the dodecahedron. £3.20 (inc. VAT) |
Advanced Polyhedra 2 This beautiful model to cut out and glue together has twelve sharp spikes emerging from pentagonal cups and forming ten pairs of parallel planes, each in a different colour. None of these ten colours occurs more than once on any spike or cup. When completed, the polyhedron rests on a horizontal surface on just three spikes. £3.20 (inc. VAT) |
Advanced Polyhedra 3 This beautiful model to cut out and glue together is the result of arranging five interpenetrating cubes in a highly symmetrical way. Each cube is printed in its own colour and so it is easy to see that exactly two cubes meet at every vertex and that there are twelve surfaces defining each face of each cube. There is a strong internal frame and multiple divisions in the golden ratio to discover. £3.20 (inc. VAT) | ||||
| | | | | | |