On the long, rambling road of history, only a handful of landmarks have survived the churn of the decades. We’re talking about culture-shaking icons such as Beanie Babies, the Macarena and the “Now That’s What I Call Music!” series of CDs. In other words:1990s trends that seemed disposable at the time, but that have come to define the decade for many people who weren’t there to experience it. “Even if you never went to a Blockbuster Video to rent a VHS, or bought a Furby, you might still know someone who did,” said Andrew Novick, co-organizer of this year’s ’90s-themed Summer Scream at northwest Denver’s historic Lakeside Amusement Park. Last year’s boardwalk-themed Summer Scream event was a sold-out success with a record 3,000 attendees, according to the fundraiser’s producers.