Bob has bought a new attachment for Benny to try. It looks a bit big and heavy, but Benny is desperate to try it out so Bob promises he can as long as he's with him to help. Bob gets an excited phone call from Sandy Beech up at the cave house. He wants to show him something important so Benny's trial will have to wait. Benny has other ideas though. He goes off looking for a building job to try out the new attachment, but everyone he comes across is making delicate things. Up at the cave Sandy shows Bob a fossil he has discovered that would be perfect for the visitor centre; they just need to carefully transport it down to the valley. Benny is still looking for something to bash, crash or smash, but when Wendy explains that Sunflower valley is more about reducing, reusing and recycling, Benny starts to wish he never got the attachment. On his way to find Bob, he tries to smash a tunnel through a rock wall.