Turn these colourful liquid tubes upside down and watch the two streams
of liquid cascade to the bottom to show the passage of time.
This three to five minute timer features dual coloured liquid going down in a
Z-formation, creating a cool visual effect. Both coloured
droplets bounce down a staggered plane in the shape of a Z at the same
time--see the droplets make their way down, only to reform again into a
larger clump at the bottom. Makes an excellent desk toy, stocking
stuffer, or unique timer for the classroom.
Note( time is dependent on weather conditions hot runs through faster cold runs slower)