Slinky
A slinky is a special toy that looks like a spring. When you hold it up and let it go, it can walk down the stairs all by itself!
A spring is a long, thin, stretchy coil made out of metal. But unlike most springs, a slinky is made of a special type of metal that can easily stretch out and bounce back into its original shape.
When you hold a slinky at the top and move it up and down, it stretches out and collapses back in on itself. This creates a wave that travels all the way down the slinky, making it look like it's alive!
When you let a slinky go at the top of a staircase, gravity pulls it down one step at a time. Each time the slinky hits a step, the impact causes the wave to bounce back towards the top, making the slinky move forward on its own.
So that's how a slinky works! It's a fun toy that can walk down the stairs all by itself thanks to its special springy properties.
A spring is a long, thin, stretchy coil made out of metal. But unlike most springs, a slinky is made of a special type of metal that can easily stretch out and bounce back into its original shape.
When you hold a slinky at the top and move it up and down, it stretches out and collapses back in on itself. This creates a wave that travels all the way down the slinky, making it look like it's alive!
When you let a slinky go at the top of a staircase, gravity pulls it down one step at a time. Each time the slinky hits a step, the impact causes the wave to bounce back towards the top, making the slinky move forward on its own.
So that's how a slinky works! It's a fun toy that can walk down the stairs all by itself thanks to its special springy properties.
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