This puzzle slides together quite easily, if you know the trick! Try to put the pieces together in the wrong order and they will block each other from interlocking.
Step 1: The Parts
You will need:
-128 1x2 plates
-12 2x2 plates
-52 2x2 tiles
Step 2: The Sticks
Each piece that you need to make will be a 2x8 stick that is made of a combination of plates and tile. There is an entirely smooth one, and two types with a 2x2 plate on them, either at the very top or two studs down. The picture shows all the parts you need to make.
Each part is made of of 4 of these sticks, 3 with a 2x2 plate and one smooth one on top.
Step 3: Part A
Follow the pictures to build Part A.
Step 4: Part B
Follow the pictures to build Part B.
Step 5: Part C
Follow the pictures to build Part C.
Step 6: Part D
Follow the pictures to build Part D.
Step 7: Solving the Puzzle