http://www.eduplace.com/kids/hmsc/activities/simulations/gr1/unite.html -Sink or float. This website is interactive and allows children to test what objects sink or float. This can help when teaching about mass, volume, density, and buoyancy.
This YouTube video explains buoyancy, density, and Archimedes’ Principle in a simple form easy for children to understand.
https://www.wonderopolis.org/wonder/how-does-a-submarine-work-2 -This website explains how a submarine works. It includes good vocabulary and ideas for you to experiment with.
