Reginald Theatre, Seymour Centre, June 19

Adele Parkinson and Monique Salle as T-Rex 2 and 1. Photo: Michael Francis

You can’t fault the timing: Squabbalogic is staging the musical Triassic Parq (“no, not that other park because we don’t want to get sued”) just as the newly released film Jurassic World is doing a roaring business at the box office, generating plenty of dino talk.

And you can’t really fault the production. But despite the best efforts of everyone involved, Triassic Parq is only sporadically diverting. Yes, it’s sweet and it’s fun, with a catchy, tuneful pop rock score (by Marshall Pailet) and occasionally witty lyrics and book (Pailet, Bryce Norbitz and Steve Wargo) but overall it feels like a mildly amusing, over-extended sketch.

The musical is a comic riff on Steven Spielberg’s 1993 film in which, as you’ll probably recall, scientists clone dinosaurs for a theme park using dino DNA and some frog to complete the DNA chain. All the dinosaurs are female to prevent breeding, but that little bit of frog causes one hell of a problem, allowing the dinosaurs to change sex in order to reproduce and ensure the survival of the species.

Triassic Parq tells the story from the dinosaurs’ point of view. Life for the “Lab” worshipping dinosaur community is thrown into chaos when T-Rex 2 (Adèle Parkinson) suddenly sprouts a penis. Meanwhile, the Velociraptor of Innocence (Rob Johnson) finds her way over the electric fence in search of answers. Bumping into T-Rex 2 outside the park, they work out what a “dick stick” is for, sending T-Rex 2’s bestie T-Rex 1 (Monique Sallé) into a jealous, rampaging rage.

The Velociraptor of Faith (Blake Erickson) – a dino with secrets – is forced to question his trust in “Lab” when the delicious goats the deity normally supplies suddenly stop appearing. And then the exiled Velociraptor of Science (Keira Daley) returns. Completing the dino cast are the mute Mimeosaurus (Crystal Hegedis) and the Pianosaurus (musical director Mark Chamberlain).

Themes of love, religion, science and gender underpin the silliness but it’s all pretty lightweight: fluff and nonsense being the prevailing tone.

The Triassic Parq company. Photo: Michael Francis

Jay James-Moody directs with his usual verve and the production has a bright, chirpy aesthetic. Neil Shotter’s clever set uses towering electric fences, which open up, and a few pot plants to create the park and the jungle outside, with lighting by Mikey Rice. Elizabeth Franklin has designed cute costumes pairing contemporary street clothes with sparkly dino feet sporting padded claws, make-up and a fair bit of bling.

The cast throw themselves into it with hugely committed performances. The singing is excellent and they perform Dean Vince’s tongue-in-cheek choreography with gusto.

Erickson gives a hilarious impersonation of Morgan Freeman before being quickly eaten, Johnson finds just the right level of innocence as the questing dino who is a little different to the rest, while Sallé and Parkinson also shine. In fact, the performances are terrific across the board. But all their exuberance can’t disguise the thinness of the show.

Adele Parkinson, Rob Johnson and Crystal Hegedis. Photo: Michael Francis

Triassic Parq won Best Musical at the 2010 New York International Fringe Festival. You can’t help wondering what the competition was like. Squabbalogic have done their darndest with it, but in the end it’s fun without being that funny and hard to get excited about.

Triassic Parq runs at the Seymour Centre until July 4. Bookings: www.seymour.com or 02 9351 7944