You can build up an activity after showing them pictures. The next step is for example to match words to the pictures. You can extend this with sentences.

You can search for free pictures on Pexels or Unsplash.

WORDWEB

Create a wordweb or wordcloud to activate the pupil's prior knowlegde.

http://www.wordle.net/

https://www.woordwolk.nl/

MINDMAPS

A mindmaps is almost the same as a wordweb, but now with little symbols, drawings or pictures in it.

https://www.mindmeister.com/nl

https://app.mindmapmaker.org/

SYNONYMS

Synonyms will let the pupils actively be busy in their search for the right words. It will extent their vocabulary.

https://www.thesaurus.com/

https://www.collinsdictionary.com