It depends on the age of the kids.
If you have a suitable backyard, start it there and make aborting an option.
Let them pitch the tent. Assist as much as neccessary - no more, no less.
Involve some fun activity that gets them tired.
A camp fire or a twig stove for preparing a meal or toasting marshmellows is no mistake. If you decide to toast marshmellows, make sure to have enough of them. Itīs no fun to run out. Leftovers can be used for breakfast.
If possible select a time without rain. Make sure that the tent does not leak - just in case it rains anyway.
The morning after is important.
Have a nice breakfast ready for the after action briefing. Maybe use the camp fire or the twig stove for preparing it.
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If it isnīt broken, it doesnīt have enough features yet.