Things to do on my own
Why not have a go at rock painting? Look in your garden or one you daily walk for any rocks you could use. You could then use paints to transform them into animals or write kind messages on them. Perhaps any rocks with kind messages you could leave somewhere on your next walk for someone else to find!
Or if you fancy doing something more relaxed, how about looking for shapes in the clouds? You could even draw what you see as well!