Magic Shop

Grown-ups

➑️ The Arrow Flip

Ooh, a good one. Here's what they'll see.

What your audience sees

You draw a fat arrow pointing to the right and stand it up behind an empty glass. Then you pour water into the glass. The arrow turns round and points the other way.

  • 🌟 Level 1: Apprentice
  • ⏱ 2 minutes to learn
  • πŸ§ͺ Potions
  • πŸŽ’ Ages 5+

Works by itself, or one simple move. It works the first try.

A potion is for looking at, not for drinking.

What you need

The secret

All tricks

Questions about this

Is magic real?

Magic tricks aren't superpowers, and that's what makes them amazing. A magician is a performer who uses skill, science and storytelling to make the impossible look like it just happened in front of you. The wonder you feel is completely real, though.

How many magic tricks are there?

Thousands. But almost every one of them is built from just eight ideas: making something vanish, making something appear, changing it, moving it, floating it, passing it through something solid, mending it, or knowing the answer in advance. Once you can spot the eight, you can see how any trick is put together.

More in Ask the Magician.

The Arrow Flip Trick for kids: the whole trick

You draw a fat arrow pointing to the right and stand it up behind an empty glass. Then you pour water into the glass. The arrow turns round and points the other way. It's a level 1 apprentice trick for ages 5 to 9 (grades K–3rd), takes 2 minutes to learn, and needs 4 things you already have. Flick, the shop's rabbit, reads every step aloud with a picture, so a child can follow it alone.

The secret

A round glass full of water works like a lens. It bends the light crossing over itself, so everything behind it comes out back to front.

What you need

  • A clear glass or plastic cup
  • Water
  • A sheet of paper
  • A marker

How to do it

  1. Draw a big fat arrow on the paper with the marker, pointing right.
  2. Stand it up against something, and put the empty the glass in front of it.
  3. Point out that the arrow still points right. Nothing has changed.
  4. Pour the water in until it's higher than the arrow.
  5. Look through the glass. The arrow is pointing left.
  6. Slide the paper nearer and further away until it flips perfectly.

Magic words to say

β€œArrows are very easily confused. This one has had a long day. Watch me turn it round without touching it. Flip-flop!”

Pro tips

  • Draw two arrows, one above the water line and one below. One flips and one doesn't, which is much stranger than one on its own.
  • A straight-sided round glass works best. A square tumbler won't do it.
  • Let your audience move their own heads about to find the spot. Doing it themselves makes it better, not worse.

If something goes wrong

If it doesn't flip, the paper is too close. Slide it back a hand's width at a time until it turns over.

Safety notes

  • A potion is for looking at, not for drinking.
  • No fire, no flames and nothing sharp in a child's hand anywhere in the Magic Shop. Nothing ever goes in a mouth, a nose or an ear.

The science behind the trick

Light bends when it crosses from water into glass into air. A round glass of water bends it so much that the rays cross over each other on the way to your eye, and anything behind the glass arrives swapped left for right.

What kind of trick is this?

🌈 Transformation. Something changes into something else. Almost every trick ever invented is one of eight kinds, and knowing which one you're watching is how magicians work out how a new trick is done.

The skill it teaches: Patter: what you say. A trick is a story, not a thing that happens. Perform it and it counts towards the Kitchen Alchemist badge.

Questions about the arrow flip trick

Is magic real?
Magic tricks aren't superpowers, and that's what makes them amazing. A magician is a performer who uses skill, science and storytelling to make the impossible look like it just happened in front of you. The wonder you feel is completely real, though.
How many magic tricks are there?
Thousands. But almost every one of them is built from just eight ideas: making something vanish, making something appear, changing it, moving it, floating it, passing it through something solid, mending it, or knowing the answer in advance. Once you can spot the eight, you can see how any trick is put together.

More from The Potion Lab

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