Playsand is good, I prefer fool filter sand as it is larger grain (easier to clean, less likely to float and ruin impellers, some say combats the anaerobic pockets that people talk about) though.
I have Playsand though mine came from Menards. I got a shload of MTS to keep it stirred up. It was cheap, easy to rinse, looks nice and fish love sifting through it.