Super Mario Marathon 5 is streaming live from a Mario-themed living room in Indiana, where a group of gamers are playing select levels from a variety of Mario games. The levels they play are determined by the amount of money donated, with 800 total levels across ten Mario games available for them to complete.
Donated money goes directly to the Child's Play foundation, which aims to improve "the lives of children with toys and games in [its] network of over 70 hospitals worldwide." Last year's event raised over $112k in donations to the foundation. Donations can be made here, and the stream can be viewed on theMario Marathon site.