Follow the other children out to the valley for some fun and games. You'll take a trip through the village and out into the woods where you'll start a game of hide and seek. After drawing straws, you'll be it and start counting. When you're finished, the rest of the children will have hidden throughout the area.
Activate Eagle Vision (L3) and start walking around the hills looking for clues. You'll find little clue markers on the grounds and if you investigate them, the camera will actually zoom in close enough for you to see the foot prints and which direction they are headed towards. This will direct you either towards a hiding spot or another clue. Continue to follow the foot prints until you find a hiding spot and then jump into it.
You'll need to be doubly sure about the hiding spot because choosing correctly every time is one of the constraints. Completing it in less than four minutes is another constraint, however, and balancing the two can be difficult. Eventually, you may find a point where you can't find any clues. It's important to remember that each child is marked with a green circle on the map so make sure you are inside one of those circles before looking for clues.
When you've found all of them, return to the original spot to draw straws again. This time, you get to hide. Continue running up the hill looking for a place to hide in any of the marked hiding spots. Some of these spots may be occupied and if it is move further along until you find an empty hiding spot.
After the cutscene, return down the hill to the village. Enter the village and we're going to try to find your mom. It's going to be kind of hard to get around though. Enter the village and turn left to enter the village proper. Keep moving forward until a tree falls and blocks your path. When it does, turn left and find the hut with the open door.
Run inside and lift the pole out of the way. At the other door will be a boat that has fallen and you'll have to run under that. Not far from where you are will be a hut with a door that doesn't quite reach the top of the doorway. Investigate the door to see your mother on the other side. From here, go to the right and you will see a large stone that looks like you might be able to climb it. You can't climb this rock but if you go around the right side of it, there will be a hole through the fire. From here, approach the right wall of the hut and watch it fall apart. Go into the hut and try to lift the debris off of your mother.
