Miscellaneous Stuff of Science that stand on their own! Semi Precious Stones $3.99 Discovery Pak (gyroscope, prism, magna-trix) $12.99 Rattleback $2.99 Planet Tracker (w/cdrom) $14.99 Copyright © 2003-2008 E-Clec-Tech. All rights reserved. All other materials and logos are copyrighted by their respective owners, or companies.