This game is a ton of fun for adults and kids.  Perfect balance of strategy and chance.  Individual hands take only minutes, but keep a running score to make it take as long as you want.  I would highly suggest that you try playing with the simpler rules where you have 2 of your 4 cards exposed.  Why?  Well it easier for the kids and, ahem, the adults to remember their 4 cards as they eventually see them.  Even better is that since the hand can be ended at any time, seeing 2 of someones cards gives you the strategy of trying to really stick it to someone if they have two 9s and are in the lead (you want a low score) even if your own score isn't super-low.  Also, we allow the swap card to have no rules: any of your cards for any of theirs and it's fun handing someone a 9 for their 0 or a card you haven't even gotten to see yet for a 2 only to see you gave your opponent a zero later.  Cards are cute and seem well made after moderate use.  This game would be fun for adults too if you like playing rummy, hearts, pitch which it feels somewhat similar to.