ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

We are redesigning a keystone arch activity that many of you are  
probably familiar with. Children build a keystone arch out of five 
blocks that they then can walk over. We had it made once, and the 
blocks, although nice and met most of our criteria were to soft and 
compress when a child of around 50 pounds sits on them. I am looking for 
other materials that will be lightweight enough for small children to 
handle, soft enough to not knock someone out when they sail across a 
room, yet sturdy enough to work under compression. Any suggestions would 
be helpful. Thanks

-- 
Chris Sancomb
Exhibit Designer
Providence Children's Museum
100 South St, Providence, RI 02903
[log in to unmask]
http://www.childrenmuseum.org
Come Play, Come Learn!

***********************************************************************
More information about the Informal Science Education Network and the
Association of Science-Technology Centers may be found at http://www.astc.org.
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]