Step 1: Getting Ready
In the pictures I have numbered and set out the pieces as a help for you, because I know there are different colours for the pieces.
Step 2: Starting to Place
Put No. 2 into No. 1 like the picture shows. No. 2 should be facing upwards and No. 1 should be on a flat surface. Now, slot No. 3 into the area that the picture shows. It should be straight and fit into a hole.
Step 3: Putting on 5&6
Yes, I know what you're thinking, "What about 4?" Well, 4 is the roof! Now put in 5 like the picture, then six. It should fit.
Step 4: Putting on 4!!!
Now, there should be a hole that will easily slot in the last piece. Take care of the cube, because it can easily loose a piece. Thank you for reading this and you're welcome for me making this tutorial.