Dude's Dilemma and Math Monsters are some fun math games that can help children strengthen their addition skills. As of 2015, students can play these freely-accessible games at MissMaggie.org and Fun4theBrain.com.
In Dude's Dilemma, players solve addition problems to save Dude the dog from a rooftop. A rescue helicopter travels closer to the building each time a correct answer is given, but loses fuel if the solution is incorrect. The game features three difficulty levels and options to also practice subtraction, multiplication and division.
Math Monsters allows students to practice adding with a single fact family or a mixture of addends. Players work through several sets of addition problems to earn antennae, eyes and other components. At the end of the game, children can create their own alien monster using the parts they were awarded.