Children's opening scene PLOT

Our idea was to have an intense beginning with a young aged boy (10-11 yrs old) running frantically away through a forest whilst being chased. This will result in a gripping beginning scene to engage the viewers interest and to ensure they are not bored.
As the boy runs past a tree, another boy (same age and a friend) jumps from behind the tree which will startle the viewers, however this leads to an anti-climax as he 'tags' his friend showing it was all a game. This will put the audience into a sense of security which is important and needs to be maintained as it is a children's film rated PG.
As the game of tag comes to an end, the other friend emerge from behind their hiding places and the narrator introduces the friends who are different in stereotypical ways making it easy for children to relate to an also an opportunity to introduce humor.