We are away for the first week, but in the second week I foresee a lot of bush walks and trips to the river. It is a bit cold for swimming yet but they paddle and collect rocks and if I take the gas cooker and a few sausages we can stay there for hours.

Borax slime is lots of fun.
Hose and sandpit never fails.

Good ideas, I will check back here when we are running low on ideas.