Kids love being in the water, even if it is just water in an inflated pool. It is also the best time to teach them some facts about the nature he/she might be interested in. Here are some examples of how to tell them about different bodies of water (you can also use much simpler words).
The largest type of body of water is the ocean. It occupies most spaces on Earth and has no boundaries. We have put names on different ocean regions -- Pacific, Atlantic, Arctic, Indian, Southern – but they are, in actual, just one continuous body of water.
Streams are also called brooks or creeks. This generally refers to flowing waterways that follow the pull of gravity downwards. Streams may flow into other bodies of water. The difference between a stream and a river is their size. A stream is usually up to 99 miles long while a river is more than 100 miles long.
Seas can sometimes be hard to differentiate between lakes because there are seas that are also surrounded by land. They can also be part of the ocean like a gulf. All seas are salty but geographers classify them into three: nearly enclosed seas, partly enclosed seas, and hypersaline lakes. An example of a nearly enclosed sea is the Mediterranean Sea. This sea divides stretches of land within continents, and the Mediterranean Sea is located between Southern Europe and North Africa. On the other hand, partly enclosed seas are like gulfs. These seas are open to the ocean. For example, the Persian Gulf is an extension of the Indian Ocean. Hypersaline lakes are lakes that are salty like the Dead Sea.
Lakes or ponds are landlocked. Their water source often comes from streams or rivers. Almost all lakes have freshwater except the Great Salt Lake in Utah.