Okay, I have been gaining a growing appreciation for this shop. We hosted an ice cream event and they had plenty of decorations that fit perfectly with what we needed. They have a ton of celebratory balloons to add that personal touch to your event. Seriously, not trying to make this sound like a commercial, haha (as I read those first two sentences back).
They have a good selection, right now they have plenty of options in stock for putting together your perfect Halloween costume (even sections solely based on specific colors). I did like the candy section, but who doesn't like candy from a giant gumball machine that takes up its own aisle. Aside from that, there's good grab bag items that you could get from the Dollar Store as well (stress balls and other toys for roughly 35 cents a pop).
Planning a party or decorating for an event, can't hurt to at least stop in here.