waruikazi
Legendary
Ian snakes will move and take up residence in the area wether there is a wetland or any other type of garden in the school or not. The more control you try to put on young kids, in areas like this, the more they will try to push the boundaries.
It's a great idea.
Would be nice for the school to include the care and observation of the wetland area and it's residents as part of the school curriculum - do they still do nature studies in infants and primary school ?
If venomous snakes are likely to visit the area sometimes, then it should be fenced off and made "visit under supervision of a a teacher" ONLY. Though I expect snakes will tend to avoid contact with noisey kiddies given the choice.