I always start full of enthusiasm, with lots of planned day trip, invitations to have their friends around and worthy projects at the ready and by the last week of the holidays I'm reduced to pleading with them to, "just find something on the telly please and I'll get you more Haribo".
So, to prepare for the inevitable decline into substandard parenting, I have them booked in to forest school for a handful of days in the last two weeks.
Up to that point, I've got a wall plan for the holidays with all our pre-booked stuff, including a small camping trip, meet-ups with friends and local stuff that's on that I found in Primary Times/ local papers/ Facebook. Then I have a list of regular places we can go, parks, museums, beach, library ect divided into good day weather and rainy day weather stuff.
I have a new Xbox game hidden in the house for when the shtf.