A story of my mum's life.

for my mum's 70th birthday we want to write a story of her life to be read out at her birthday tea by her grandson. We have a few little storeys and dates and events that happened but putting it all together in an entertaining way is proving a job to big. I don't know if its something anyone can help with or how much something like this will cost. The talk will need to be about 30 minutes long.