ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** I would love to see the music boxes you reference. Do you have a link or a photo? I have seen a hand crank music machine that included a conveyor belt with attached wooden slats with curved cutouts. Think a row of depressions carved into each wooden slat like the cups in an egg carton. The visitor could place balls in the cups they chose. As the visitor cranked the belt, in turn, each slat of balls would fall onto the keys of a marimba, I believe. It has been a long time since I saw this beautiful, creative musical device. I think it was at the Manhattan Children's Museum in NYC. Does anyone know if it is still there or who designed and built it? Becky Fox Matthews Senior Educator/Special Projects Manager Adventure Science Center 800 Ft. Negley Blvd. Nashville, TN 37203 voice: 615-401-5073 *********************************************************************** For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org. Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org. The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit http://www.lsoft.com/LISTSERV-powered.html. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask]