Teaching subjects like science can be really challenging, especially during these unprecedented times. I've monitored several teachers for some months now and many of them use online games to get their students engaged. I've seen the science teacher in particular, use kahoot as a fun way to test the children's knowledge in the subject. With Kahoot, you could either use the web link or the app. There are hundreds of games available, which covers several topics. However, if you don't want to use those pre-made games, you can create your own. I've also used pinterest to gather ideas on how to do some at home experiments using household materials. I hope these suggestions help.