Dear son Draco,
I became aware of the news that you are organising a sapling planting event at your school. I would like to take this opportunity to make you aware that I am very proud of your act and I am in full support for it. I shall be visiting you on the event day. However, there are certain things which I need to tell you and hence it is for this reason that this letter has surfaced. Such an event requires expertise to be followed.
You may be aware of the exact procedure for planting the sapling but the naive ones around you may not be so. Hence, this might result in spoiling the event. I would like to give you the reference of the ‘Every Day Green Day’, since they proved voluntary services for such events. I am looking forward for a successful sapling planting event from my son.