During the part where Miguel and Tulio get separated after the bridge collapses, you will notice that the large idols will ask for tribute, such as something to please the eye. First, on Tulio's side, keep exploring until you see one of the idol's ears light up on Miguel's side. Stop Tulio and switch to Miguel, then have Miguel play his reed to the idol. After the idol has raised a gigantic block, have Miguel explore until one of the idol's eyes lights up. Stop, and switch to Tulio. Have Tulio cross the only risen block and get the golden plate. Take the golden plate to the idol with the eyes lit and show it to her. Once the block has risen, explore until an idol's nose lights up on Miguel's side. Switch to Miguel and show her the sock. Afterwards, explore until the last idol's mouth glows. Have Tulio feed him a biscuit and you are done.