Musical Theatre in a primary school

Hi, firstly can I apologise but I could not work out where to place a new post so Iam unclear as to whether iM in the righ tplace and if this is correct - so please forgive me. My son starts school tomorrow and I am hoping to be involved in some way with the school. As far as I understand they do no kind of end of year show despite having a great band etc. I LOVE musical theatre and am a great organiser so I thought my contribution to the school could be to help put on a show each year! Great idea? But I would need lots of help as I am even unsure where to start? I would need help with music etc, but I presume the school will have a music teacher? (The school is fairly big with 4 classes per year. I just wondered: * Has anyone done this at a school? * Where could I source scripts and music? * Is this too ambitious? * Any advice anyone can give would really help me out. Thanks in anticipation for any advice.