ELI5: Explain Like I'm 5

cucumber

Cucumbers are a type of vegetable. They are long and green, with a thin skin and lots of crunchy seeds inside. You can eat them raw or cooked, but most people like to slice them into salads or put them on sandwiches. They are a very healthy food because they are low in calories and sodium, but are full of vitamins and minerals that your body needs.