What's the longest anyone's ever stayed awake?

Here’s a machine that drops water from the ceiling. How could you use this machine to tell the time or make a clock?

A computer controls the water. As the water falls, it lines up to make different shapes, like the shapes of numbers, to tell the time!

This clock also uses water! Like a fountain, water sprays up from holes. The water forms numbers, letters, and Japanese words!

Most clocks tell you the time by tracking hours and minutes. Is there a longer amount of time that a clock could track?

This amazing clock tells the time, the day, the month, and the year. It even tells the temperature, and has tiny planets that move!

Some people hate waking up. They turn off their alarm but stay in bed. What alarm clock could you invent to get people out of bed?

Here’s an idea--you could invent an alarm clock that moves. You have to get out of bed to chase these alarms that roll or fly away!

Some old clocks play a little tune every hour. What do you think is going on inside the clock to make the music? Listen.

Inside this clock there are tiny hammers that hit metal rods. Each rod makes a different sound. It’s kind of like a xylophone! Listen.

This musical clock has a bird that pops out! Its “ding” sound is from a hammer hitting metal. Its “cuckoo” sound is made by whistles!

The black liquid in this clock looks like it’s moving all by itself. What in the world is going on? Take a guess.

The liquid is magnetic--it can be moved with a magnet! Inside the clock are hundreds of hidden magnets, pulling the liquid.

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