Once you know how, it's fairly simple.
Imagine that this game is like the game you see magicians play with 3 cups and a ball and you have to guess which cup the ball is under.
The item to find WILL ALWAYS be put in the box on the right-hand side.
Then the boxes will start flashing two at a time. (the flashing boxes are changing places with each other)
So if the box on the right flashes with another box, it has swapped with it, if the other two flash then the item is stays where it is. Keep a track with your finger or your eyes which position the original box moves to each time (if it flashes it has moved, if it doesn't it stays where it is).
After the boxes stop moving (swapping places) your tama will automatically move to the middle position. Use your A button to move it so it is standing UNDER the box you think the item is in.
When your tama is under the box you think the item is in - press B, and *hopefully* you will have got it correct, and gained 3 points in the relevant skill area!