Use a range of paint charts and try and match the treasures collected from the forest to the nearest shade of colour. E.g. moss, leaves, seeds, flowers.
Create a mood colour wheel using natural materials found in the forest. Appreciate the beauty of the treasures found.
Collect different shaped/coloured leaves and create a pattern on a thin stick to hang outside or near a window.
Create a journey stick during a mindfulness walk through the forest.