This is our plan to tell them at the moment, see what you think, its a work in progress.
We fly on a Monday, so the Monday before a letter arrives for each of them in a posh envelope with a mysterious note inside that says 'We miss you, we hope you will come and visit again soon' but nothing more.
On the Wednesday a box arrives in the post with a small Disney something inside for each of them, but no message, lots of confetti in there too to make it more exciting.
On the Friday a letter comes to say make sure you are in tomorrow, you will get an important delivery. The next day, Saturday, my lovely neighbour plants their trunki's on our doorstep, with a balloon and pretend plane tickets attached, rings the door bell and legs it. We let them find them and hope they figure it out from there, they are only preschoolers so hope they will. Then it would only be '2 sleeps' until we fly and we can all get very excited.
What do you think? Too much?