https://www.hsa.ie/eng/Publications_and_Forms/Publications/Agriculture_and_Forestry/Stay_Safe_on_the_Farm_with_Jessy.pdf (although I disagree with banning dangerous play outright, some level of risky activity is required although warnings & supervision & basic actions to make environment safe as possible)
There are some dangers on a working farm
(e.g. tractors, machinery and vehicles on roads and in fields, large animals, slurry pits).
All visitors to the farm should be aware of risk.
There are some educational resources that could be useful: