From the Manufacturer
At the Boulder Blast Quarry site kids can get fun “exploding” action just like a real demolition area. Kids can load boulders into the pit area at the top of the site using the Bulldozer vehicle (use the scoop to push the boulder or use the articulated arm to shoot it) or by hand using the load ‘n lift cargo bin to dump them in. Once the pit’s all loaded up, push the dynamite blaster and Kaboom – get fun exploding boulder action. The set comes with 2 boulders and also features an EZ Guide Ramp which allows RC Vehicles (sold separately) to be easily aligned to the track so even the youngest kids find success driving up the site.