Here are some links for games that help review the science concepts we have been learning in school.
Second Grade:
https://www.abcya.com/states_of_matter.htm
https://www.bbc.co.uk/schools/scienceclips/ages/5_6/sorting_using_mate_fs.shtml
https://www.harcourtschool.com/activity/states_of_matter/molecules.swf
https://www.bbc.co.uk/schools/scienceclips/ages/9_10/gases_fs.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/7_8/characteristics_materials.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/8_9/solid_liquids.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/9_10/gases.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/9_10/changing_state.shtml
First Grade:
https://www.scholastic.com/magicschoolbus/games/sound/index.htm
https://www.bbc.co.uk/schools/scienceclips/ages/5_6/sound_hearing_fs.shtml
https://www.harcourtschool.com/activity/science_up_close/402/deploy/interface.swf
https://www.bbc.co.uk/schools/scienceclips/ages/10_11/see_things_fs.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/7_8/light_shadows.shtml
https://www.bbc.co.uk/schools/scienceclips/ages/9_10/changing_sounds.shtml