I put them all over the foyer. My only complaint about the kit is that it didn't have enough yarn for me. I would have liked to have more of them spinning webs. It may be hard to tell from the pictures, but these spiders are huge. There are several sizes/poses, and the smallest one is still as big as my hand. Spooky!
I made sure to put them by light switches and door locks to heighten the creep-out factor. See the big hairy spider in the middle of the balcony? He actually moves! He's activated by loud noises, and he'll drop 2.5 feet straight down and then reel himself back up. Fun!