Absinthe is a drink that looks like water but is definitely not water. It's made from special plants called wormwood, anise, fennel, and sometimes other herbs. These plants are mixed together with alcohol and then the mixture is distilled, which means it's boiled and the steam is collected and turned back into a liquid. This makes a very strong drink that adults sometimes like to drink in small amounts.
But beware, because absinthe has a special ingredient called thujone, which can make you feel crazy if you have too much of it. That's why it's very important to be careful and only drink a little bit at a time.
Some people like to drink absinthe in a special way that involves a special tool called a "absinthe spoon" and a flame. The spoon is placed on top of the glass and a sugar cube is put on it, then the absinthe is poured over the sugar cube. Then the sugar cube is lit on fire and allowed to burn for a few seconds until it starts to melt and drip into the absinthe. This is called "the louche" and it makes the drink turn a milky white color.
Overall, absinthe is a pretty cool drink, but it's not for kids! It's a drink that grown-ups can enjoy in moderation, but they have to be careful because it's very strong and can make you feel funny if you have too much.