You can try feeding it crickets in a shallow glass bowl, they shouldn't be able to get out and it will give your toad some time to do some hunting. You don't want to overdo pill bugs, that is not a good staple food for your toad, but occasional feedings is okay. If the grasshoppers are small enough, they are a good choice for your toad, but it is best to pick the long rear legs off as they can cause impaction. Like I said, you can try cutting up some worms, as long as the pieces are wiggly, they should catch his attention. And they are slow, so he shouldn't have a problem snapping them up.

Because the toad is so young, you really need to get some calcium and vitamin dust. If it doesn't get those essential nutrients, it will end up with deformities because it is in such a critical growing stage right now.

You have to give him some time too, it's going to take a bit for him to get used to his new environment. You can try covering 3 sides of the tank so he has some privacy to get accustomed to it. When you're feeding, just drop the food in and walk away, no toad taken out of the wild 4 days ago is going to be okay with taking it from your fingers or tongs. If you really want to keep an eye on how much it is eating, do the bowl trick. Keep your hands out as much as possible for the time being.