When the beach is soggy, the playground is puddled and everyone is getting a little too familiar with the couch, an indoor day trip can save the day — and possibly earn you “cool grandparent” status.

From dinosaurs and sharks to indoor skiing, climbing walls and vintage arcade games, these family-friendly indoor attractions in New Jersey offer plenty to do when the weather refuses to cooperate.

The Edelman Fossil Park & Museum at Rowan University gives families an up-close look at the prehistoric creatures that once roamed New Jersey.

Although the outdoor fossil dig is especially popular on sunny days, the museum also offers plenty of indoor activities for rainy-day visitors. Families can explore interactive exhibits, enjoy hands-on fossil experiences, try virtual reality activities and meet live animals.

It is an especially good choice for grandchildren who love dinosaurs, science or digging for hidden treasures.

Adventure Aquarium is one of New Jersey’s best-known indoor family attractions and is home to more than 15,000 aquatic and semiaquatic animals.

Visitors can see sharks, stingrays, sea turtles, penguins and other marine life. Popular experiences include touch tanks, the walk-through Shark Tunnel and a suspended rope bridge located above shark-filled waters.

The aquarium offers enough exhibits to fill several hours, making it an easy rainy-day trip for grandparents and grandchildren.

Liberty Science Center combines hands-on learning with the kind of exhibits that keep children moving, experimenting and exploring.

The center features animal habitats, interactive STEM activities, the Touch Tunnel, the Infinity Climber and a large model train display. It is also home to the Jennifer Chalsty Planetarium, one of the largest planetariums in the world.

It is the perfect place to sneak in a science lesson while the grandkids think they are simply having fun.

American Dream is more than a shopping mall. The massive indoor entertainment complex in East Rutherford offers activities for nearly every age and interest.

Families can ski at Big Snow, ride attractions at Nickelodeon Universe, splash around at DreamWorks Water Park, explore a mirror maze or visit the New Jersey Hall of Fame Entertainment and Learning Center.

With restaurants, shopping and entertainment all under one roof, it is an easy place to spend an entire rainy day without hearing, “What are we doing next?”

Silverball Retro Arcade on the Asbury Park boardwalk is part arcade, part museum and part nostalgia trip.

The attraction features hundreds of rotating pinball machines, along with classic games such as Skee-Ball and Pac-Man. Visitors pay for admission rather than individual games, allowing children and grandparents to play as much as they like during their visit.

The grandkids may know their way around a tablet, but grandparents could have the home-field advantage when it comes to pinball.

Northlandz is a must-see destination for train lovers and families who enjoy miniature worlds.

The Flemington attraction is home to one of the world’s largest model railroad displays, featuring miles of track winding through miniature mountains, tunnels, bridges, towns and landscapes.

This is a slower-paced outing that rewards curious children who like spotting tiny details and following trains as they travel through the enormous display.

When the grandkids need to move but the weather says “absolutely not,” ClimbZone in Howell offers an energetic indoor alternative.

The climbing center features dozens of colorful themed walls designed to resemble objects and landmarks such as giant piano keys, Mount Rushmore and a map of the United States. There is also an indoor playground for younger visitors.

It is a smart local choice for children who enjoy climbing, exploring and testing their courage — while grandparents cheer from solid ground.

Whether the grandkids are interested in dinosaurs, sea creatures, science, trains, climbing or arcade games, New Jersey has an indoor attraction that can turn a dreary day into a memorable adventure.

And when they tell their parents how much fun they had, you can quietly accept your promotion to coolest grandparent in the family.