Take the drops fromt the T-Rex Nest Event to your Dealer where they can then be exchanged for valuables such as 10 Green Scales for a Pistol, five egg pieces for an Ice Axe, and two eggs for a Pan. You will find that these three items are extremely useful so it is worth putting time into this event to get them. The events in Jurassic Survival will change periodically so it is advised that you take advantage of the T-Rex Nest Event while it lasts.