story linked from wsj.com
"... On a 10-acre plot of dirt, framed by distant mountains, Mr. Mumm guides his guests to a fleet of Tonka toys come to life -- a skid-steer loader, a 115-horsepower excavator and Caterpillar's D5G bulldozer, 10 tons of glinting muscle."I wanted to create a place where people could come and play -- relive their sandbox days, but for real," Mr. Mumm ..."
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