Forget about buying those $1.99 flash cards from Wal-Mart if you or your child are in need of some multiplication facts work. Mental Maths by Trilliarden has a fun and exciting system for exercising your brain and improving mental math ability.
When playing, Mental Maths presents a series of math facts along with a puzzle. For each right answer, a portion of the puzzle is filled in. If there is a wrong answer those pieces go blank. By the end of each round the more right answers there are, the more complete the puzzle. It adds just enough fun to appeal to children, yet is not overly gimmicky as to turn off adults.