to keep the segment moving. Hutton's catchphrase, after presenting a hypothesis he postulates the audience may be curious about, was to declare "well, I'm glad you asked," before responding to the hypothesis. The use of household materials was deliberate, in order to demystify science and ensure that children, wherever they lived, could make what they needed rather than rely on buying it, and this proved popular with the young audience who could easily replicate the demonstrations at home. Morrison suggested that they should always show what they had made working so that children would know that their own constructions would work if made properly and also to show the limitations of the constructions to dispel any overambitious expectations. Both Morrison and Hutton always told viewers to get their parents' permission before building things or conducting experiments, especially if it involved the use of sharp objects such as knives or scissors or the use of flames or hot or dangerous liquids. Spin-offs Four companion books were available in 1981 produced by Jacaranda Press containing scientific explanations and instructions for experiments for children to perform at home. Each of the books was themed upon one of the four Western classical elements of earth, air, fire and water. Together, Hutton and Morrison published 11 books, including Supermindstretchers,The Arrow Book of Things to Make and Do, and String for Lunch (Ashton Scholastic). Morrison published more than 40 additional books, which included material from The Curiosity Show, including Nature in the Making, A Field Guide to the Tracks and Traces of Australian Animals (the first such field guide in Australia and still the only one to deal with all taxa), Clever and Quirky Creatures, It's Raining Frogs and Fishes, and many more for the school reading programs of various publishers. Morrison's Field Guide to Tracks and Traces—and a segment he had prepared for The Curiosity Show on dingos at Uluru—led to his involvement in the Morling Royal Commission inquiry into the Chamberlain convictions. He gave evidence on dingo and dog tracks and conducted various forensic investigations on dingo gapes and behaviour. His collection of specimens and artifacts from the trial have been acquired by the National Museum of Australia. The Children's Television Workshop wanted to make a version of the Curiosity Show using American scientists as presenters. Rob Morrison and Deane Hutton were consultants in the early planning stages. PBS did not think that middle-aged