Finalised ideas for childrens film

It's set in school where we are introduced to our main characters Katie and Jesse. Katie is a shy gentle character who plays on her own hoping one day she will be loved; Jesse is more of the opposite, popular, the class clown. Both characters share a negative relationship, Jesse continuously teasing Katie craving her attention. One time she is walking alone again, upset and in pain, when she notices a glowing book in the distance, so enlightened she is lured into this magical item she goes to pick it up but Jesse spots it too and is determined to beat her to it, both of them grab it at the same time, transporting them to a secret realm. In this land it's full of adventure and obstacles for the two of them to get past, gripping and appealing to both genders. At first they spend a lot of the time arguing but when they realise they need to help one another a bond grows and a friendship is developed. They are not alone in this place which is the biggest obstacle they face, they were secretly joined by an outcast child whom no-one knows, later do they learn that he is a monster in disguise and his plan all along was to trap them in this dangerous world. They must defeat him together in order to escape, it gets very close but Katie gets hurt which charges Jesse up giving him the power to win. Together they escape; Jesse no longer teases her and Katie becomes more confident and makes new fiends, together they 'fall in love' and the audience is given their happy ending...