Publisher's Synopsis
Part of a series of books which introduce the reader to science and technology through active involvement in project work and experimentation. Twenty projects in each title help the reader to understand the theme, and in this particular book the principles of flight are examined.;The series emphasizes safety and experimental techniques such as organization and planning, record-keeping and cleanliness. Instructions are given in detail with illustrations used to help qualify points of possible confusion. Projects where adult supervision is considered necessary are marked by a symbol. Each title includes safety rules.
