Depending on your level of English, children's songs can be quite good. They are simple enough that you can follow along, and contain enough words that you will probably learn some new ones. Another option is to watch English TV shows. I currently watch Japanese variety shows as I find them fun, and I usually end up picking up new words when they are repeated often enough. You could also go on twitch.tv and watch some streamers playing games you like. The good streamers usually talk a lot and interact with the viewers, so you can learn new words that way whilst also hearing native speakers talk lots.