Just keep the pond, they’re a fantastic feature, far nicer than some decking and tarmac in what some people like to call a ‘garden’ If you are concerned about a child falling in, you could simply put a tough raised net across the top of the pond, about 2″ so that the frogs can still have access, people often do this when they have coy and the like, keeps the Heron’s out.
Failing that, cover the garden in bubble wrap.