LDS.org: All General Conference Talks about Testimony
LDS.org: Lesson Helps for Teaching Children
LDS.org: Resources for teaching Children about Testimony
LDS.org: Scriptures about Testimony
Boyd K. Packer excerpt about Testimony and the importance of bearing it
"Can I Really Know?" - Experience by Boyd K. Packer on testimony (comparing to explaining salt)
David O. McKay Gains his testimony
Here we Stand - Joseph Fielding McConkie (on bearing testimony of Joseph Smith)
Loren C. Dunn excerpt from Gen. Conf.
Mexico Story (story told by Pres. Hinckley in Gen. Conf.)
President Merrill Bateman shares experience at BYU Dev. (missionary struggling with testimony)
Teach Them to Testify (HOW to bear testimony) Boyd K. Packer
The Soil and Root of Testimony - excerpt from Gen. Conf. - Elder Carmack
Quotes (link to the Daily Wool)
Testimony - quotes from our leaders
"A testimony is fragile. It is as hard to hold as a moonbeam. It is something you have to recapture every day of your life"
-Harold B. Lee (Church News, July 15, 1972, p. 4)
"How to Gain a Testimony" - Loren C. Dunn
"I Testify" - President Ezra Taft Benson
"Knowing That We Know" - Douglas L. Callister
"Let the Clarion Trumpet Sound" - Gregory A. Schwitzer
"Safety for the Soul" - Elder Holland's strong testimony
"The Importance of Receiving a Personal Testimony" - Robert D. Hales
"Testimony" - President Gordon B. Hinckley
"The Power of a Personal Testimony" - Dieter F. Uchdorf
"The Witness" - Boyd K. Packer
"I know What I Know" - Monte J. Brough - New Era
"Steadfast in Christ" - M. Russell Ballard - Ensign
"With the Sound of a Trump" - New Era
"Blessings of a Testimony" - BYU Dev. by Merrill Bateman
"Line Upon Line, Precept Upon Precept" - David Bednar - BYU-Idaho,
"On How We Know" - Truman G. Madsen
"Stand Forever" - Elder Lawrence E. Corbridge
See "True to the Faith" pp. 178-180
"Fireworks and a New Bike" (about a little girl gaining a testimony) Friend Magazine
"Gaining a Testimony through the Holy Ghost" (FHE Resource Book - lds.org)
"How Do I Know if I Know?" by John Bytheway
"Worth the Wrestle" - Sheri Dew (2 CDs) - very good!