Anna Claybourne has written over 150 children's books on all kinds of subjects, from sharks, black holes and splitting the atom to how to draw, Shakespeare's life, and Greek myths and legends. She knows a lot about conservation in the rain forests of Costa Rica as she once volunteered there for three months. She likes space, sewing and music, plays the trombone and loves going camping. As a young boy Tim was constantly doodling, finding any excuse to put pen to paper. Since turning his much-loved hobby into a profession, Tim has achieved success illustrating and authoring children books and working on commissions for clients, such as Habitat, Paperchase and the BBC. With influences ranging from Dr. Seuss, Keith Haring and Jean-Michel Basquiat, Tim's vibrant illustrations are full of humour and a sense of mischief, and you can always count on him to inject plenty of personality.

• 1: The silly science of Machines!2: Wonderful wheels3: Keep on rolling…4: crazy catapults5: Pivot power6: the first toilet7: Down the pan8: The X-ray and the swallowed spoon9: Marvellous medical machines10: Delivery drone11: Other Futuristic flyers12: Satnav to the sea13: Mechanical mistakes14: Which bike is best?15: Pedal power16: Mouse Vs Mouse17: Computer control18: Robodog to the rescue!19: Robot world20: Sci-fi fogbots21: Tiny Technology