Science may never give us an authoritative answer to whether children’s love of trucks is a nature or nurture deal. What exactly is it about a garbage truck coming down the street or a fire engine’s siren that makes a preschooler lose what little self-control he or she possesses? However children come by this obsession, it was a genius move by Explorium Denton to make it the basis for their big annual fundraiser. March 4th at the C.H. Collins parking lot was the 3rd annual Touch a Truck event, a veritable paradise of large machinery for kids. And let’s be honest, a lot of the parents were digging it too. The excitement of children is contagious.