This game for 1-2 players can be used to review converting between grams and kilograms.
There are two ways to play.
1. It can be used with 2 players playing the traditional game of war. The card with the highest mass would win.
2. It can be used as a matching game with one to two players. The player(s) would attempt to match cards with equal mass.
It aligns with the third grade's CCS 3.MD.A.2 as well as with fourth grade's CCS 4.MD.A.1.
If you like this game, check out Measurement: Capacity War & Matching.