tape & glue hole shut (leave "flap" open so it can make "noise" to be more realistic! When kids are noisy, "sprinkle" the silent sprinkles over their heads & then tell them to use the magic silent sprinkle to get self-control.
Cute idea for measurement common core- do a few times a year. Read Big Dog, Little dog, and then measure each child to see how tall they are. Make a chart for display, and leave out the measuring tape for a few days!