One of my favorites is this penguin craftivity. Students follow math directions to construct a penguin. The skills used include congruent shapes, geometry, fractions, comparing numbers, and subtraction. The best part is seeing how unique each penguin is, even though students used the same directions. They also make for a cute hallway display each year.
I also want to shout out to Dots-N-Spots for her Knock It Off games. The multiplication one is a big hit in our room right now, but she recently made addition and subtraction ones too. How fun!