How Does It Work

It has 64 colorful pages that answers everything! From questions about How does a pencil write? to How does a can-opener work?.

Contents:

1. How does a pencil write?
2. How does an eraser rub out?
3. How does a ball-point pen work?
4. How does a sharpener mend a pencil?
5. How does a water tap work?
6. How does a water pistol work?
7. How does a torch work?
8. How does an electric bulb work?
9. How does a neon light work?
10. How do traffic lights work?
11. How does a vacuum flask work?
12. How does a vacuum cleaner work?
13. How does a bicycle work?
14. How does a boat float?
15. How does a helicopter fly?
16. How does an aeroplane fly?
17. How does a key open a lock?
18. How does a zipper work?
19. How does a match stick kindle?
20. How does a cracker burst?
21. How does an escalator work?
22. How does a lift work?
23. How does a digital watch work?
24. How does a telephone-set work?
25. How does a radio-set work?
26. How does a television-set work?
27. How does a camera work?
28. How are photographs made from film?
29. How does a clinical thermometer work?
30. How does a mirror reflect work?
31. How does science use lenses?
32. How does an X-Ray machine work?
33. How does a washing machine work?
34. How does a sewing machine work?
35. How does the toast pop-up in a toaster?
36. How does a pressure-cooker work?
37. How does a refrigerator work?
38. How does a magnetron work in a microwave oven?
39. How does an electric iron work?
40. How do weighing scales work?
41. How does a type-writer work?
42. How does a photocopier work?
43. How does a windmill work?
44. How does a kite fly?
45. How does a hot-air balloon go up?
46. How does a parachute work?
47. How does a see-saw work?
48. How does a whirl-swing work?
49. How does a lawn-mower work?
50. How do fire-extinguishers work?
51. How does a calculator work?
52. How does a computer work?
53. How does a crane work?
54. How does a robot work?
55. How does a magic slate work?
56. How does a flush-toilet work?
57. How does a door-well work?
58. How does an automatic door work?
59. How does a piano work?
60. How does a top spin?
61. How does a can-opener work?