Fraction Monkeys is probably the most enjoyable way there is to learn about equivalent fractions. It has already been used in thousands of schools with great success. The student simply drags the monkeys into place on the number line. If a mistake is made a clear clue is given to aid success.
I am thinking I will start my bulletin board with this. Each flap is a famous mathematician and it is the students job to help me discover what each one did. Weekly bell ringer using books stored in my classroom??!