LOT OF TV/MOVIES! They will survive. LOL! My oldest was not quite 4 and my other was 2.5 (and not PT yet) when I started bedrest with #3. Have easily accessible snacks that the 4 year old can get (maybe up on the counter & have a small step stool so the dogs can't reach it) and let your husband worry about cleaning up crumbs/mess when he gets home. Color Wonder markers and Aqua Doodle so they can just color, do art right in bed with you without making a mess.
If you're already to 31 weeks without bedrest that's great!! Hoping you have many more weeks of baby baking time.
Trish: mama to my 3 PE Princesses:
Elizabeth 11/6/03 induced at 37 weeks for PE
Katie 4/13/05 induced at 38 weeks for PE
Allison 12/27/07 induced at 36 weeks for PE then PP PE & BP issues for over a year