ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** Everyone - Let me focus my original question a bit - We've got a $12,000 donation and a nice patch of flat lawn (triangular, about 40 feet long and 15 feet wide at the widest end). We are doing a nice native-planting/river landscaping thing on another piece of riverfront property, so no need to rivers stuff on this patch. I was thinking more along the lines of echo tubes, etc. - solid, few moving parts, last 5-10 years. Too cloudy for fun Clore Garden solar stuff, and water/plumbing is too expensive for this area. (Could I make this more impossible?!) My own list, and a summary of this discussion (minus the water ones) runs to: Giant 'magnifying glasses' with different filters and lenses A field of 6-foot turbines Drums Pan Pipes Echo Tubes Sound Delay Tubes Heat Tunnels - one black, one white Element Stones (Flush-to-ground 'headstones', each with an element on it) Torsion Wave Lever Lifter Human Sun-Dial Hedge Maze Rock Maze Optical Illusion Sculptures Sand Rock Maze - Dennis Bateman *********************************************************************** 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]