Take three cups of firmly pressed together dryer lint for volume. After you have measured it out, separate the lint into small pieces. Place the lint into a large mixing bowl.
Now take 1/2 a cup of warm water. Add to it a food colouring of your choice. You can use several food colours to make dough of different colours to make the activity more fun. You need ample food colour to replace the grey of the lint and colour it. Mix the colour well in water and pour it over the lint.
Measure 1 1/2 tablespoon of dish washing powder and add it to the lint mixture. Measure another 1/2 cup of white glue and add it to the large mixing bowl of lint mixture.
Combine everything in the mixing bowl really well using a wooden spoon. Stir until it is too solid to move. Use your hands to knead it to soften it up and give it consistency. You can add more food colouring at this stage to enhance colours. Now you can use the play dough to make a model. However, since it is not a commercial product, it is best if you use within a couple of days and better fresh because it can lose the consistency and cohesiveness if you let it lay. Make a sculpture and dry for 48 hours to preserve it.