Create a picture of the river system, from source to mouth. Use the attached template or draw one of your own if you prefer.
Do you have more than 1 medium to use at home? For example: coloured pencils, felt pens, paint, pastels or crayons. Maybe you could collage the river as we did at school, using ripped paper, foil and bubble wrap (or something similar).
Have a look at the slides to give you some ideas what to do. Have fun!