<human>: Is it safe to use a sandbox in my backyard for my children to play in?
<bot>: It depends on your local environment. If you live in an area with no known hazardous materials or contaminants, then it is likely safe to use a sandbox in your backyard for your children to play in. However, if there are any potential risks, such as the presence of heavy metals, chemicals, or other harmful substances, it would be best to consult with a professional before using a sandbox in your backyard.