“Hold on to your butts.” The gates of Jurassic Park have opened once again for visitors looking to be amazed by dinosaurs roaming the earth once again for “Jurassic World.” “Park” fans will be delighted to hear of the several hidden Easter eggs in the new movie as homage to its predecessors.

Keep your eyes peeled in “Jurassic World” for these eight hidden references to the 1993 first movie:

1. That Music
If you grew up with “Jurassic Park,” that inspirational John Williams score will bring back all the warm memories of the original. “Jurassic World” does the unforgettable theme justice and includes it in the movie several times, including the closing credits. Here, you can see Williams conducting the Boston Pops in the famous tune.

2. Jurassic Park Merchandise
Lowry (Jake Johnson) is a Jurassic World employee with a morbid love of the park’s dark past. On the day everything goes awry, he is reprimanded by Claire (Bryce Dallas Howard) for wearing a Jurassic Park T-shirt to work.

3. DNA Mascot
Mr. DNA also makes a comeback as a mascot for safety and the cloning process in “Jurassic World.” Just as he did in 1993’s “Jurassic Park,” Mr. DNA can be found on the “Jurassic World” website explaining what the scientists do to create the dinosaurs for the park.

4. Abandoned Jurassic Park Building
When the two young boys, Grey (Ty Simpkins) and Zach (Nick Robinson), of “Jurassic World” veer off course and right into the path of Indominus Rex, they seek shelter in an abandoned building, which many will recognize as the old hub of Jurassic Park. Using the banner that falls at the end of “Jurassic Park” as a torch, the pair discover the painted walls of the original park building like abandoned cave paintings. Easter eggs abound in this scene.

5. Old School Wheels
In their search for a way back to the civilized part of the island, the two boys find abandoned 1992 Jeep Wranglers from the original Jurassic Park. They manage a quick repair (the cars haven’t been started for more than 20 years) and it’s back to the temporary safety of Jurassic World.

6. Dilophosaurus!
Remember when Nedry (“Seinfeld” actor Wayne Knight) tries to escape the park with dino DNA in “Jurassic Park”? This frilly fella shows up with poisonous spit and brings down the curtain for this bad guy.

7. InGen
The cloning company founded by Dr. Hammond returns to the island after the death of its sitting CEO Simon Masrani (Irrfan Khan) in an effort to recapture its latest creation gone wild, Indominus Rex. Well, their return to the “Jurassic Park” series could have gone better (they’re never the heroes in the franchise). A bit more of an obscure Easter egg, but one that will be recognizable for fans of the franchise. 

8. And T-Rex!
From the iconic park logo to one of the final shots of Steven Spielberg’s 1993 movie, Tyrannosaurus Rex has been a major part of the “Jurassic” franchise. Its appearance in “Jurassic World” is the stuff of dinosaur fan fiction, but that didn’t stop the audience from cheering at the screening at an ending not too dissimilar from “Jurassic Park.”

“Jurassic World” opens in theaters Friday.