How to assemble mortise and tenon balls

Assembly method of mortise and tenon ball:

1. Find the two pieces of wood that determine the tenon-mortise ball.

2. Find the block that fills the same gap between the two main blocks.

3. Insert the wooden block that fills the small gap at the lower part of the left wooden block.

4. Put the other half of the subject together.

5. Clip the corresponding wood blocks into the remaining grooves.