Sometimes as a parent you just have to assume what the kids like is fun.  For Bakugans,
you have to assume they are a lot of fun since they are sold out most
of the time at the stores and my kids are absolutely obsessed with them.

If you are new to the Bakugan world consider this explanation- it is a cartoon and game like Pokeman with a twist, a very interesting twist- you get spherical creatures who transform into a creature, a Bakugan, when they come into contact with a Bakugan card (or any metal surface actually).

The little colorful balls are spring loaded and must contain a magnet that
releases the spring and launches them into action.  Arms, legs and
typically a head of some sort pop open as soon as the ball rolls onto a
metal surface.  The playing cards contain a metal strip that activates
the Bakugan balls and also gives the battle statistics of the creatures. 
Furthermore, their points ranking is printed on the creatures so they
can be ranked and rated for battle.

As I mentioned, as an adult I have a hard time understanding the attraction to these type of games,
and even more trouble keeping the names and species correct.  But the
boys love it.  They can tell you who is who, what powers they have,
what points they are and more information than you want to know.  I
hope this type of activity improves their memory rather than rot their
minds.

Regardless of if I get it or not, they sure do.  Bakugans are a big hit and I have to say I feel there is more to them than the Pokeman cards and other card based game.  And the little transforming character balls are kind of interesting to observe, as a battle bystander.  I am sure the boys would rate these off the charts but I have to say, from an entertainment perspective, they get high ratings from me as well.