 | author: A. G. Smith asin: 0486264262 binding: Paperback list price: $6.95 USD amazon price: $6.95 |
Complete, step-by-step instructions for making 18"-high, camouflage-patterned periscope, complete with reflecting mylar sheet. Ingenious cardboard device (easy enough for children to construct with little adult help) introduces youngsters to scientific principles of optics and hours of viewing fun.