This is an activity in itself. Print out this Free Pick Holiday Jar sheet, grab a jar and a pen. Have your kids write down things they like to do at home to keep themselves entertained or for you to do with them.
Let them write it all down, then put the strips of paper in the jar. During the holidays, whenever they are bored, get them to pick something from the jar. Each school holidays my kids get to pick something fun they want to do which costs money.