Older Kids and Prodromal Labor

We are hoping that I go into labor once the kiddos are in bed, so I can labor alone. Then we'll wake them up as the baby gets close to actually coming out. If its during the day, someone will be here to hang out with the kids, so that's not much of an issue.

What I'm worried about is that I have nice bouts of prodromal labor for weeks before I actually give birth and I want to have some stuff stashed to occupy them so I can labor in peace. (They will be 9.5, 8, 5 and 2.5 years old at the birth.)

I'm not opposed to video games or movies, so I will have some of those for the boys (9.5 and 5). But what's good - safe and not a mess - for a 2.5 yo little boy? And I usually give my dd (8) craft stuff, or set her up to bake, to keep her busy, but that won't work if I can't supervise in the kitchen or watch the little ones won't get into the craft stuff.

Any suggestions???