human
How do I determine if my sandbox is safe for my children?
assistant
Determine the safety of your sandbox by checking the following: 
1. Is it properly enclosed and secured with a fence or other barrier?
2. Are there any sharp objects or materials that could be hazardous to children?
3. Does the sandbox have adequate drainage so that water doesn't accumulate in it?
4. Is the sandbox clean, free from debris, and not near areas where people may walk?
5. Have you checked the pH level of the sand before allowing your children to play in it?