3rd: You need a 2x or 3x Barlow lens
What does a Barlow lens do?
A Barlow lens can increase the magnification and allow the short focal length telescope to achieve its maximum usable power. Perhaps the biggest benefit of a Barlow is that it doubles the number of magnifications available to you, effectively doubling the number of telescope eyepieces in your repertoire. 2x Barlow lenses are the most common.
I have two Barlows to choose from. They are the Celestron 93529 X-Cel LX 1.25-Inch 2x Barlow Lens (Black) and the Celestron 93428 X-Cel LX 1.25-Inch 3x Barlow Lens (Black).
2x doubles your eyepiece magnification, and 3x triples your eyepiece magnification. The eyepiece is attached to the Barlow lens as shown below. Then the bottom of the barlow attaches to the telescope.