Big toys for big kids — that’s the winning formula behind Diggerland XL, a construction-themed fantasyland in New Jersey where giddy adults can get behind the wheel of full-size wheel loaders, bulldozers and a 26-ton (24-metric-ton) excavator.  Diggerland XL is the latest attraction at Diggerland USA, a 14-acre (5.6-hectare) family amusement park in West Berlin, New Jersey, located 20 minutes outside of Philadelphia. Since 2014, kids and their parents have flocked to Diggerland USA to live out their Tonka truck dreams, riding and operating mini excavators, dump trucks, asphalt rollers and skid-steers. Now mom and dad can get in on the fun, too. For the 2016 season, Diggerland USA unveiled Diggerland XL, an 18-and-over construction playland. After a quick training session by a licensed machine operator, adults are let loose on the construction beast of their choice, although there’s a clear favorite. “The excavator is the winner, hands down,” says Ilya Girlya, Diggerland USA co-founder and CEO. “There’s just this sheer power that everybody loves. I can appreciate that.” Girlya comes from a construction family. His father owned and operat...