For kids that have a basic interest in math, try using daily riddles to keep them thinking throughout the day. At breakfast, you may ask your child a riddle like, "What number has three tens and four ones?" or, "What is a mathematician's favorite dessert?" Your child can take the day to think about the riddle and tell you the answer when you're working on math practice worksheets after school!
setting a goal for each team to earn at least X amount of points (perhaps 5 or 10, depending on how long you plan to play the game), and continue playing until every team has met their goal and the whole class has experienced success