The exposition is when Tommy's aunt gives him the blocks. This leads to the conflict easily. It also lets you know a lot about the auntie and Tommy. You also learn a little about the mommy.
The rising action is when Tommy nonstops plays with his blocks (he can't stop himself.)Then the conflict is when Tommy chooses to play with the blocks. This occurs right before the rising action. As you can see these two things are very similar.
The conflict is when Tommy chooses to play with the blocks, when he already has a bad feeling about them. This happens right before the rising action.
The climax is when Tommy gets possesed by the blocks and can't stop himself from going to the place they spelled out. This shows you the power of the blocks and may turn around what you thought about them. It also puts the story into action.
The falling action is when Tommy goes missing (because of the blocks.) This starts to wrap up the story, because now the blocks have done their job and shown their power.
The resolution is after the mom throws the blocks out the window and then a little girl finds them on the sidewalk. This is the ending of the story, that leaves you on a mysterious cliff hanger.