Take Aim! I would stick or write the numbers on a wall and then use a wet sponge to throw at the numbers.
Solve It Strips BUNDLE! Hands-On Math Puzzles
Solve It Strips are a fun, hands-on math center that requires no prep for the teacher! Students use their mental math skills to work through a variety of math standards and they can easily self-check their work on each activity strip. 16 different sets are currently included in this bundle!