Adding Fractions Puzzles works on practicing the skills of adding fractions with unlike denominators. This is a free sample. The paid product has 65 puzzles to choose from. Copy on cardstock, laminate for durability year to year and cut them up. I would put several puzzles in a resealable bag so that students have to problem solve in order to solve the puzzle. This is a great center activity, or indoor recess activity.
Here is a link to the paid product.