I first saw this when I was 3 years old, soon after I saw "The Land Before Time". Okay, so when I was 3 I had no concept of fear. I just thought dinosaurs were friggen awesome. However, after watching this at age 18, I was like "woah! I actually watched this before I even started kindergarten???" The movie is amazing, and you do actually learn about dinosaurs and DNA and a bunch of other things that will fly over kid's heads. But every child who loves dinosaurs should see this.
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I really liked how all-appealing this movie is. When I was young, i just liked seeing dinosaurs run rampant and roar and beat each other up. Now that I'm an adult, I actually was able to pick up on a TON, and i do mean A TON of deep, though-provoking messages. The last time I saw this movie, not counting the fact I just saw it again 15 minutes ago, I was only 10 years old. Even at that age, I didn't see any of the subliminal messages. Children will be thoroughly entertained by the mere idea of resurrected dinosaurs, while teens and adults will be asking themselves, in light of the growing technology, "Should we even attempt this?".
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This movie IS violent. Their is only two parts where you actually "see" something. 1. you see a goat leg fly onto a car 2. you see the arm of a man fall onto a woman (the rest of the man was eaten). That is it. As for other violent moments, you see people getting dragged into cages by raptors, grabbed over the head and eaten during a famous toilet scene (what a way to go, eh?), jumped on by a raptor (but leaves obscure the violence very well), a man attacked by a small dino in a car (pretty disturbing, actually, though the fogged windows obscure it all), and not to mention many other perilous moments where younger audiences WILL be frightened (even I was a little jumpy during this). This movie could have EASILY been R for violence alone (sex and swearing would have ruined the movie anyways), but I am grateful Stevie S. kept it to PG13.
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Awesome movie. Watch it. I have not seen the other two, so exercise caution with those. I heard JPIII was a bloodbath, but I dunno. Anyways, I love the movie, it's awesome, and always will be. The CGI was super amazing for the time this was made, it really impressed me.