Do You Know?: Hand Dryer and Toilet Roll

OBSAH

Maddie is looking at things we use when we go to the toilet. She visits a factory to see how hand dryers work. She shows us how infrared light is used to switch the machine on and uses her special camera to see water droplets blasted off her hands in slow-motion. Next, Maddie heads to a toilet roll factory to see the how toilet rolls are made.