Hi Petar, you can also have a look at the following site and check if there are any interesting options in Israel http://www.workaway.info/

I am pretty sure there are lots of programs like that.I know there is one called "Taglit" and it is also possible to volunteer in many places. A short Google search produced this http://www.workingholiday.org.il/ I am sure there are more programs. Good luck