The dictionary is full of words and perhaps there are same entries that really define you.
Can you think about some words?
Use this activity to ask your students reflect on themselves or somebody else.
It is interesting to find for example a noun, an adjective or a verb that really describes them.
Work in pairs or individually. I found this interesting quiz and you can use it, too.
For further activities, you can even ask your students to bring pictures of themselves some years ago and to compare them. It will be a funny activity and they will practise loads of past tense forms and adjectives!