I keep a pan of sand in my brooder and my chicks love it.
It soon gets messy, though, and their interest wanes...
I re-purposed an old strainer/colander from my kitchen--the kind with a fine screen mesh--to sift the poop and debris out.
I place the colander in the bottom of a large paper bag and dump the sand into it.
The holes in the screen are just the right size to filter out debris, while letting the fine playground sand sift through. A few shakes, and the sand is screened and poop-free.
I dump the poop and aspen shavings that are left in the strainer into my composter and refill the pan with the newly screened sand.
It's a lot easier and faster to use than a small scooper or strainer, and you don't have to sift multiple batches or search around for debris that might be buried.