Below is a breakdown of that specific episode, along with other notable "Dancing Flowers" media you might be searching for. Tokyo Ghoul √A: Episode 2 - "Dancing Flowers"
“I remember the [dancing flower toys]! Omg this site constantly brings back childhood flashbacks!” (Dub) 2 : Dancing Flowers
If the anime episode isn't what you're after, here are a few other possibilities: Below is a breakdown of that specific episode,