The beach toy item is a square based pyramid with the following parameters
[tex]\begin{gathered} side\text{ length of base= 4 inches} \\ height\text{ of pyramid = 4 inches } \end{gathered}[/tex]Explanation
The volume of the pyramid will indicate the volume of sand that the beach item can contain.
[tex]volume=\frac{1}{3}\times base\text{ area}\times height[/tex]Therefore, we will have;
[tex]\begin{gathered} volume=\frac{1}{3}\times4\times4\times4 \\ =\frac{1}{3}\times64=21.3 \end{gathered}[/tex]Answer: 21.3 cubic inches