Using these Jurassic World Heroes of Goo Jit Zu toys is super easy. Just grab the toy dinosaur and stretch it as far as you can. It can stretch up to 3 times its normal size. When you're done stretching, let it go and it will return to its original shape. You can also play with the 'Chomp Action' by moving the jaws to open and close. For the Mosasaurus, have fun squishing and squeezing it to see the goo and prehistoric fish move inside. As for the collection part, try to get all four dinosaurs - Alpha Blue, Amber T. Rex, Carnotaurus, and Mosasaurus to create your own world. When it comes to maintenance, keep the toys away from sharp objects to avoid tears. If the toy gets dirty, you can gently wash it with mild soap and water and let it dry thoroughly. Remember, these toys are for kids' entertainment, so don't use them for any rough or improper purposes.