Online resources and tools
There are many excellent online resources and tools that can make teaching science to primary school kids engaging and interactive.
One of the websites I have used in the past is the NASA kids club, not only does it show age based videos to children, it also has some interactive games and educational activities that compliment the learning. NASA also has an excellent YouTube channel for kids which explains missions and has videos of astronauts giving talks on astronaut life.
National Geographic also has lots of videos, games, and activities on a wide range of scientific topics including space.
The European Space Agency’s site for kids is excellent as it involves educational content about space missions and the universe.