I would love to demonstrate this idea in my classroom and make my students do it for homework . Using a cereal box to practice math facts make it much more fun for the students and the teachers. The only problem is the teacher may have to collect all the cereal boxes for the kids to take home and make his/her own direction to go along with it . ( It also depend on the students age range.)
The slips of numbers with blanks throughout are a great way for students to learn the sequence of numbers. The slips can either be laminated to where dry erase markers would work, or the magnetic numbers also would work. This could be an activity to integrate sequencing in math.