I have never heard of Mario Party. Is this a game by Nintendo?
Yes! It is on Nintendo Wii. It is a virtual board game. You get to hit a block to decide how far you go and there are like mini battles and stuff.
So it's a board game as a video game. Interesting. You don't explore a world like Mario Bros. 
Nope. You select a map, which is like a board game. Then you jump to hit a dice. You go that many places. You can buy candy to use during your turns, or earn it. The candy kind of has the same idea as the special squares on Mario Kart. Then you can also land on different colored spaces and they each mean different things. At the end of each turn, there is a mini game to see who can win extra coins.
Usually Nintendo games are designed really well. Is this a game meant for older players? Usually the Mario games are "twitch" games for 12 year olds. (Not Twitch the web site)
It can have up to 4 players at a time. You either play with 3 computers or other people. A
I think you got cut off. That's ok. 4 player games are great for parties. Adults probably prefer something a little less intense. 
I was going to say that adults and children both enjoy the experience. I know families that play it on family night! 
That's great. Usually the parents have been sidelined by video games because the kids were either too practiced or the game was too fast. Arcade games are fun when you're young. Dominoes and such when you're older. 
Haha right! no, it is not fast at all. It moves along like a board game and the mini games are really fun. There is cleaning, painting, tightrope, jumprope, and so many other things to do to earn coins.