They are 3, and 19mths.
My ticker is a bit out - I'm not actually going till Sunday night.
DD#1 is the type to over-think and get stressed about things, so I didn't want to tell her too far in advance. She does know I'm going away, but we haven't spoken about it in detail yet.
I thought I could talk about it properly the day we start to make the calendar.

The map idea is great! Will def use that

Unfortunately I probably wont have computer, but will have my phone on a few of the days. I was also thinking of making a few pre-recorded video messages?