We are nearly done. We are going to add some style to your cube by adding some FILLETS or CHAMFERS.

What is a FILLET: A fillet or round connects two objects with a tangent arc in 2D, or creates a rounded transition between the adjacent faces of a 3D solid. An inside corner is called a fillet and an outside corner is called a round; you can create both using the FILLET command.

What is a CHAMFER: The chamfer tool creates a beveled feature on selected edges, faces, or a vertex.

Step 8:
From the MAIN TOOLBAR select modify then FILLET or CHAMFER

Step 8a:
After you have selected FILLER or CHAMFER select the edge that you wish to apply the change too.

Step 8b:

Repeat this with any other edge you wish to add a FILLER or CHAMFER to.

CONGRATS you have completed your cube within a cube!!

Now will save your file so it can be 3D Printed!

From the MAIN TOOLBAR select the MAIN MENU drop-down arrow
Then select SAVE and TO MY COMPUTER
Name your file using the following format CUBE_IN_CUBE_YOURNAME