Hi Leah,
dropping to make craters is a great inquiry activity, since the children can play with the equipment for a bit to get a sense of what is going on, then make a starter question with a prediction based on what they understand.
There is the Curious Minds Activity: https://www.sfi.ie/site-files/primary-science/media/pdfs/col/meteorites_activity.pdf
I make one change, since I keep the material around for my next visiting school – so I use different colour sand as the impact surface. This way I don’t have a food product hanging around all year. If you get sand from a local builder’s providers or hardware supplier, allow time for it to dry. The bags are often stored outside and the sand is too wet to flow when you first get it.
There is a nice ICT extension: https://down2earth.eu/impact_calculator/planet.html?lang=en-US
that lets you vary the mass, diameter, material of impactor and material of surface and then see the size of crater that gets created!
