Golden brick #1
Walk to the dinosaur's excrements and, as Ellie, dig up part of the golden brick. Pick it up as Udesky and follow its trail. It will lead you to the second part of the golden brick.
Golden brick #2
As Grant, walk to the pile of ground and dig up part of the car from it. For repairing the car you will receive the golden brick.
Photo #1
As Grant, walk to the pile of ground shown on the picture and dig up the bricks from it. Create a tripod from them, and then use it as Billy to take the picture.
Worker in Peril #1
Walk to the house as Owen and use the wrench to release the worker in peril. The worker you save is Donald Gennaro.