I get the house to myself for the next week. I am wondering what kind of messy shenanigans I should get into. I bought some jeans and PVC pants from amazon. I'm wondering what substance I should try. I've only really ever tried shaving cream. This substance needs to be able to go down the drain. Any thoughts?

You can always use items like ketchup, mustard, pancake syrup, chocolate syrup, barbecue sauce, spaghetti sauce as these all wash down the drain easily. These go especially well with jeans and a white shirt or Tshirt. Go for it and have fun

Well, if you can, why not do 'somethin' out-doors ???