Physical properties

Test them out on different types of material!

http://www.bbc.co.uk/schools/scienceclips/ages/7_8/characteristics_materials.shtml

Your Weight on other Planets

http://www.exploratorium.edu/ronh/weight/

States of matter under the microscope

http://www.harcourtschool.com/activity/states_of_matter/

and

http://www.chem.purdue.edu/gchelp/atoms/states.html