today we're going to show you the folding egg experiment.

you're going to need a safety pin, an egg, some vinegar, 2 glasses and a bowl.

firstly, take your egg and very carefully make a hole in two ends of the egg using your

pin. once you've poked the pin through the shell,

you'll need to wiggle it about a few times in order to make a hole large enough for you

to blow through. it also needs to be large enough so that the

egg can be squeezed out through the hole on the other side.

very carefully hold your egg over a glass and blow into one hole.

you'll see that the egg starts to run out the other end.

once that's done, you'll end up with an empty egg shell.

next, take your vinegar and fill one of your glasses.

you can use white vinegar or ordinary household vinegar.

once that's done you'll need to submerge your egg inside the vinegar.

because it's got air trapped inside, it will start to float.

the trick here is to hold it under the surface so that air bubbles can escape from the egg

and vinegar can fill it up. you can see the small bubbles coming through

the hole in the egg. once that's done leave the egg to sit for

at least a week. we've left it for 10 days.

once that's done remove your egg and submerge it in bowl of water.

you'll see that the egg shell has become soft. if fells a little bit like a small plastic

bag. this is because the vinegar has dissolved

the egg shell leaving only the membrane from the inside the egg.

because you've made holes in the egg shell, you'll see that you're able to fold it up.

when you fold it, the air escapes from the membrane.

however you can softly blow into one hole in the end and re-inflate the egg shell

or you can try throwing it around like a ball. as you throw it around, air will enter through

the holes in both ends and will gradually re-inflate the egg.

you can do all sorts of cool tricks with it. you can flatten it, fold it in half, crunch

it up into a ball and make all sorts of strange shapes

it will still re-inflate. why don't you try playing keepy-uppy with

it and see how you can do. and there you go. that's how you can make

your very own folding egg. thank you for watching. i hope you enjoyed

the experiment. come back soon for more exciting science and

don't forget to leave us any comments. see you soon