These, my friends, are Bakugans. Ba-koo-gahnz. They are, unsurprisingly, Japanese.
Also unsurprising, my son's love for them. They have introduced a whole new language to our house. One that I try to ignore. It includes "words" like robotallion, darkus, serpenoid, falconeer, pyrus, aquus and ohmygodi'mgoingtokillmyselfifihearonemorethingaboutfreakinbakugan. Okay, so the last one is mine.
If anyone has any questions about these bizarr-o things, let me know and I'm sure I can get you an answer from G. That is, if M lets him open his mouth before butting in to answer.
Also? [whisper]They're really kinda cool. Don't tell my kids I said that.[/whisper]