I wish to peruse a hobby that satisfies the following conditions:
1. Should have a connection with nature (for e.g. field trips).
2. Should have a scientific background and value.
3. Should be able to perform at all geographic locations, including the place I am from; the Netherlands.
4. Exciting, novel and most importantly, economical.
In addition, it is desirable to have economic value in the long run, though not mandatory. I understand it is a difficult question, thus my posting to the community!. If you have been carrying out such hobbies , kindly help me out by listing them.
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