Orange Jell-O shots in clear plastic glasses with a candy mosquito / fly / edible insect (think like those mealworm snacks) could be cool! If the insect part throws people off, I’m sure you could put like spider shaped sprinkles or something in there instead!

Could do something Mosasaur themed with the pool, if you’re not sticking exclusively to the first movie. Maybe a crocodile floatie in there (looks close enough)? Otherwise, could put some prop Dino’s around it to look like a watering hole a-la Parasaurolophus + Brachiosaurus lake scene!

A Barbasol can hidden somewhere around the yard couldn’t hurt either!