Simon has very little interaction with the littluns other than picking fruit which they cannot reach as he passes though a group of them on his way to his 'secret place' in the jungle. Essentially Simon is a loner but what contact he has with other boys tends to be with the bigguns, in particular Ralph.
Simon
Simon is depicted as gentle and kind-hearted, and he is known to be attentive and caring towards the littluns. He shows compassion and understanding towards them, often helping and comforting them when they are scared or in need. Simon's interactions with the littluns stand out as he tries to create a sense of community and comfort for them on the island.
In The Lord of the Flies Simon cares for and gets along well with the Littluns. He takes the time to care for the Littluns.
Simon
Simon paused on his way to his 'secret place' to pick fruit for a group of littluns, which they eagerly took from his hands. They were simply interested in obtaining fruit and once Simon had fulfilled that need for them they had no further interest in him or his plans.
Jack, Roger, and the Littluns kill Simon when he shows up to warn them.
Simon and Piggy are the characters who treat the littluns the best in "Lord of the Flies." Simon shows kindness and care for the younger boys, while Piggy acts as a protector and voice of reason for them. Both characters try to create a sense of unity and support among the littluns in the novel.
Simon volunteers to go back with the message to Piggy and the littluns that the boys will be home after dark.
Ralph, Jack, Roger, Piggy, Simon, Samn'Eric, Percival Wemys Madison, The littluns', Naval officer. Total characters: 9 + littluns'
find six screws and help simon groul fix his plane help buster get his stuff follow busters music and follow the cocaloco
If you really mean 'Who are the littluns' then the answer is simply that the littluns are the younger boys aged around six years old or so, some a little older. There is no specific age at which boys cease to be littluns and are counted as biguns. Apparently Simon, Roger and Maurice are in the transition area but they are all counted as biguns and their ages are never stated.