What is a neko toy?

Excuse me, could you possibly enlighten me on the concept of a "neko toy"? I'm curious to know if it's a specific type of collectible or a plaything of some sort. Are these toys related to a particular culture or trend? Additionally, do they have any unique features or characteristics that set them apart from other toys on the market? I'd appreciate it if you could provide a concise yet informative explanation.