There are many tools for the garden and many ways to injure yourself with the tools. Here is a comprehensive site about how to safely use many tools ranging from hand clippers to tractors: https://ohioline.osu.edu/tags/small-farm-and-garden-safety-series
The garden is a wonderful place for children to learn about nature and food production. Excited and inexperienced hands can lead to injuries that can harm a child or cause an unpleasant experience in the garden. The following references address garden safety for children.