Although the books on this list aren't all geared towards encouraging children outdoors, their approaches may be well suited to that cause. Here are a few selected books:
DOODLEPEDIA
This book combines some aspects of an encyclopaedia with a creative edge, which encourages the reader to finish the page illustrations with their own ideas. For example, a spread gives a few beginner's facts about the television and encourages the reader to complete the illustrations of television sets with their favourite TV shows, and another about sharks where you must draw in the shark's dinner in his belly.
I love the idea of this book, which isn't far removed from 'Wreck This Journal' but geared towards children and combines inspiring creativity with interesting facts. From a design point of view I love the simplicity of the page design, which is very understated and allows the child to overshadow the illustrations with their own. This aspect of interactivity in the book is something that I would look to include in my own, and encouraging the child to get outdoors and also get creative and involved in art is something I would look to replicate.
THE USBORNE HOLIDAY ACTIVITY BOOK
This book is designed for travelling when on holiday it seems, whether by car, train or plane, and features similar activites to Doodlepedia as well as puzzle sections. It also includes activites to try whilst on holiday such as games to play and recipes to make. Again, this would be an approach that I could easily adapt to fit the needs of the brief.
100 THINGS TO MAKE AND DO
This is again a very similar design, with an approach which encourages children to engage in craft activities. From the design of the cover it seems to be aimed at quite a young age group as the colours are mostly pastel shades and is very easy on the eye.
THIS BOOK IS TOTALLY RUBBISH
On a similar theme, this book again encourages children to engage with arts and crafts but with a view to recycling and teaching them about sustainability. This is something close to the heart of Naturesbase and something that I will have to keep in mind when designing my book.