Arkansas is looking for private donations a grants to fund a statewide health improvement plan. State officials unveiled the plan yesterday. Its goals to accomplish before 2006 include a public-awareness campaign, a study of the effect of diet and exercise on students` body-mass indexes and promoting community gardens. The plan was developed in response to the Healthy Arkansas initiative announced in May by Governor Mike Huckabee. That initiative set goals of reducing Arkansans` obesity, tobacco use and physical inactivity within two years.