This has some good ideas and pics:
Sarah Smiles: Dane's Jurassic Park Party!!!!!!
Can't remember the name of them, but I got my son, Kal-El, a Dinosaur Egg from a Reject Shop type of thing, which was made of hard sand.. You get a little wooden hammer and chisel, and chip away, until you find a plastic dinosaur in the middle.. If you can't find them where you are, you could try this:
Dinosaur Treasure Eggs: Crafts for Kids. Lessons and Activities for children in kindergarten to grade 12: KinderArt ®
Or depending on when you need them, I could get you a heap from here, think they were about AUS$3..
Decorations: Place a "Jurassic Park" logo on your front door to recreate the large entrance doors seen in the first film.. Add some faux jungle leaves and random dinosaur toys around the main party room..
"Jurassic Park" Soundtrack: Create atmosphere at the party with the official "Jurassic Park" soundtrack composed by John Williams.. The soundtrack features 16 non-lyrical songs that capture the excitement and themes from the film..
Pin the Tail on the Dinosaur: Instead of running from dinosaurs, blind fold children and have them try to pin the tail back on.. Choose spiky tailed dinosaurs like a Stegosaurus or long-tailed dinosaurs like a Apatosaurus..
"Jurassic Park" Board Games: Form teams and play one of the three official "Jurassic Park" board games.. In each of the games players choose either dinosaurs and humans and race through game boards.. The "lost World" edition is the most involved with 3D buildings, rescue missions, and a fun back forth between teams..
"Jurassic Park" Bingo: Instead of simply watching the "Jurassic Park" films, turn it into an interactive bingo game.. Create 10 to 20 cards featuring a 5 by 5 grid.. In random grid spots write out common things you would find in the movies..
For example, "A dinosaur roars", "Someone says Jurassic Park", "Someone screams", "A person is eaten" and so on.. The first person to get a line calls bingo, the movie is paused, and the winner is declared. Award small dinosaur figures for winners of each game and then continue the movie..
Dinosaur Pinata: Bash away a dangerous dinosaur like a T-rex or Raptor pinata.. The classic party tradition will keep kids involved and they will love diving for the candy that escapes the pinata..
Dinosaur Fossil Kits: Have children act Dr. Grant and other characters from "Jurassic Park" with dinosaur fossil kits.. These small kits can be purchased for a low as a dollar and allow children to slowly pick away at dirt and reveal a mystery dinosaur fossil..
Extra Touches: Keep the "Jurassic Park" theme with extra party touches.. Recreate the "bathroom" scene by placing a T-Rex toy in your bathroom.. Hang up movie posters around the house.. Hand out "Jurassic Park" goodie bags filled with dinosaur party favors and official merchandise..