Speedy Gonzalez always tries outwitting foes with Mexican jumping beans. Are Mexican jumping beans for real? And if they are, how do they work?. Not actually a bean at all (beans being seeds from the family Fabaceae, also known as Leguminosae), the Mexican Jumping Bean is the seed. We still have spaces available in our current term. Please contact us to check availability. Auckland / Northland; Waikato. Auckland East & Ponsonby; Auckland.