Spy Science: 40 Secret–Sleuthing, Code–Cracking, Spy–Catching Activities for Kids Autor Jim Wiese et al. 30 sep 1996 Paperback Preț: 76.05 lei 3-5 săpt. | 4-10 zile
Cosmic Science: Over 40 Gravity–Defying, Earth–Orbiting, Space–Cruising Activities for Kids Autor Jim Wiese 24 apr 1997 Paperback Preț: 84.86 lei 3-5 săpt.