But between the ages of around two and five, the number of words they know absolutely rockets, and they'll start sticking them all together into sentences like 'we go to the park'. All kids learn ...

There are lots of different types of words that children need to understand when learning a language. As well as names, there are action, describing, location and feeling words (and many more!).

The study is published in the journal Psychological Science. "Even at a surprisingly young age, kids have sophisticated ...