Simpson Technologies Corporation
The world's leading supplier of foundry molding sand preparation technology including batch and continuous mixers, coolers, sand reclaimers, sand laboratory testing equipment, core sand preparation systems and mixing plants to the chemical processing industries.
http://www.simpsontech.com/

Sand Artists
Sand Artists - Manufacturer Of Sand Art Cards And Colored Sand.
http://www.sandartists.com/

ChromaSand LLC
Manufactures Happy Hues Colored play sand products. Includes product and safety information and store locator.
http://www.happyhues.com/

Richards Engineering Inc.
Richards Engineering Ltd. Manufacture and Install Foundry Equipment & Plant for the Automotive, Investment, Aerospace & Diecasting Foundry Industry world-wide.
http://www.richards-engineering.co.uk/

Omega Foundry Machinery Ltd
No-bake foundry and ancillary equipment, core shooters, gamma vator, mould manipulator, sand production, sand mixers, die casting, sand reclamation.
http://www.omegafoundrymachinery.com/

Association of Play Industries
Association of Play Industries representing over 85% of the UK play industry
http://www.playindustries.org/

Play Signals as Punctuation: The Structure of Social Play in Canids
Paper by Marc Bekoff discussing the use by animals of specific signals primarily to initiate or maintain social play.
http://cogprints.org/158/00/199709003.html

Little Tikes Commercial Play Systems Inc.
Little Tikes Commercial Play Systems Inc. manufactures commercial playground equipment, play systems, play structures and contained play products designed to challenge, stimulate creativity and promote safe play for children.
http://www.ltcps.com/

Family Enhancement & Play Therapy Center
Offers professional training and case consultation in play, filial, and family therapy. Includes information on continuing education, certifications, and play therapy ideas.
http://www.play-therapy.com/

Sand Cat - Felis margarita
General information and a photo of the sand cat. From Big Cats Online.
http://ds.dial.pipex.com/agarman/sandcat.htm