I wonder how many other kids also find it suspicious? It wasn't until I saw the South Park episode years ago that I finally studied it outside of LDS teaching materials.
Here is what the current Primary Manual is teaching the kids on this story:
http://www.LDS.org/ldsorg/v/index.jsp?v ... &hideNav=1
Teach the children about the loss of the 116 pages of the manuscript translated from the gold plates, as described in the following historical account (refer to the map where appropriate). Discuss the revelations concerning this event that were given to Joseph Smith in Doctrine and Covenants 3 and 10.
Once Joseph and Emma Smith were settled in Harmony, Pennsylvania, Joseph began to translate the gold plates. At first Joseph spent a lot of time becoming familiar with the plates and the language in which they were written. As he studied and prayed, the Urim and Thummim helped him understand the characters on the plates. Joseph learned that the process of translation requires faith, hard work, worthiness, patience, and obedience.
Martin Harris went to Joseph Smith’s home in Harmony to help the Prophet in his work of translating the gold plates. Martin became Joseph’s scribe. As Joseph read out loud from the plates, Martin Harris wrote down the words Joseph read. After two months of work, Joseph had translated the first part of the plates. The translation was written on 116 pages of paper.
Martin asked Joseph if he could take the 116 translated pages back to Palmyra with him. Martin’s wife and friends had criticized him for leaving his farm to help Joseph, and Martin wanted to show them the pages so they would believe he was doing the Lord’s work.
Joseph asked the Lord for permission to let Martin take the translated pages, but the Lord said “no.” Martin asked Joseph to ask the Lord a second time. Joseph asked the Lord again, and again the answer was “no.” Martin pleaded for Joseph to ask the Lord once more. Joseph wanted to satisfy Martin, so he asked the Lord a third time. This time the Lord said Martin could take the translation if he agreed to show it only to his wife and certain other members of his family. Martin promised that he would not show the pages to anyone else. He took the 116 pages of translation to his home in Palmyra.
A few days after Martin left, Emma Smith gave birth to a baby boy who lived only a few hours. Emma was very sick and almost died. For two weeks Joseph stayed by Emma’s side and helped care for her. When Emma became stronger, Joseph became concerned about Martin Harris, who had been gone with the translated pages for three weeks. Emma encouraged Joseph to go to Palmyra to find Martin.
Joseph went to his parents’ home in Palmyra and sent a message for Martin to meet him. When Martin arrived, he cried out, “Oh, I have lost my soul! I have lost my soul!” Joseph jumped up from where he was sitting and exclaimed, “Martin, have you lost that manuscript? Have you broken your oath, and brought down condemnation upon my head as well as your own?” (quoted in Lucy Mack Smith, History of Joseph Smith, p. 128). Martin admitted that he had broken his promise and had shown the translated pages to other people. The 116 pages had been lost or stolen.
Joseph exclaimed, “All is lost! all is lost! What shall I do? I have sinned—it is I who tempted the wrath of God. I should have been satisfied with the first answer which I received from the Lord; for he told me that it was not safe to let the writing go out of my possession” (quoted in Smith, p. 128).
Joseph and Martin suffered greatly because of the loss of the translation. Joseph returned to Harmony, where he prayed for forgiveness. The angel Moroni took the gold plates and the Urim and Thummim for a while. Later, because of Joseph’s sincere repentance, the Lord forgave Joseph, and Moroni returned the plates and the Urim and Thummim. During this time Joseph received the revelations found in Doctrine and Covenants 3 and 10.
Explain that the Lord told Joseph that Satan had influenced some wicked people to take the pages. These people intended to change the words so people would not believe the Book of Mormon (see D&C 10:10–19). Joseph was told not to retranslate the first portion of the plates (see D&C 10:30–31). Because the Lord knows all things, he knew that this incident would happen. He had therefore commanded the ancient prophet Mormon to include a similar account of what was included in the 116 pages in another part of the gold plates (see Words of Mormon 1:3–7). Joseph translated this part instead of retranslating the lost part (see D&C 10:38–42). Joseph learned that Satan and wicked people could not stop Heavenly Father’s work (see D&C 3:1; 10:43).