Two types of frogs: hollow body and plastic. Hollow bodies are more expensive, but more durable as well. They offer a different presentation (walk the dog) and can be fished as fast or as slow as you want. They come pre-rigged with hooks. A bonus is that they float well. plastic frogs are cheaper but less durable, you have to get hooks for them as well (most common 4/0 EWG). The action is provided by the bait you just cast and retrieve. Not as good for fishing super slow, most frogs tend to sink and they dont look all that real once the bass gets a good look. Also they can get caught up in weeds at times since the hook is below the bait. Brands to consider: hollow - spro, river2sea, koppers, scum frog, sumo frog. Plastic - yum, zoom, stanley ribbit. Number 1 protip: wait for the weight before setting the hook. You're just not going to hookup with the first half dozen fish once you start fishing a frog for the first time because you will pull the bait away. It's an super exciting way to fish as bass will often slam the lure. You have to wait for 3-4 seconds and feel a weight before you set the hook. Good luck!