Research Ideas for Young Scientists, More Research Ideas for Young Scientists and now ... The market will bear as many as Mr. Barr can turn out. His experiments make use of commonplace articles and his directions for successful demonstrations are carefully given, step-by-step. Mildred Waltrip does the clear line drawings that illustrate them, with attention to placement of materials and their handling. Ideally suited to the junior high school level of science instruction, Mr. Barr's books have been a boon to instructors as well as students, for they suggest ideas for further experimentation with budget-saving materials.