I had pretty much finalised my logo design but I've had a change of heart and wanted something much simpler and something that could easily have a transparent background, so as not to distract from the rest of the design. I also wanted to work in 'Wonders of Nature' somewhere to highlight that its part of a series.
The original logo:
And my revised version:
I think it comes across and far more modern but still keeps a sense of fun with the sketchy texture of the clouds. Overall I am happy with it.