A couple of years ago, I made a nature bag for Emma. However, I wasn't very happy with the bag - it was a bit floppy - and Olivia didn't have one.
So I have made new bags for both girls. Each bag is lined with the fabric used as external trim and they have lots of pockets, both inside and outside, for all those things that they might collect. They also contain bags and containers, as well as necessary equipment such as binoculars, magnifying glasses, pencils, books and so on.