Is there a way to create a substance out of household materials that is liquid paste then will solidify?

you could try elmers school glue i used it for my zombie costume last year and it was amazing! um something that i use when i run out of glue is if you get a cup and put a little bit of flower and some water. Mix it well and you have yourself some glue.

Normally I would agree with using a regular glue, but you have to be careful when you’re applying it to someone’s skin, especially their face! Glues can be toxic, and/or your sister could have a reaction to it. If you want to use glue, I’d recommend applying a face masque first, like the cheap kind in a tube for cleansing your face. Actually, that in itself gives you a kinda freaky look where your face looks all stretched and shiny. And it can start to peel in places, so if you’re going for a zombie look or anything else scary, leaving some of it drooping off, like skin falling off, might be a solution! Hope this helps :)

Elmer’s Glue-all is a safe bet, followed by a bit of white flour and also a bit of linseed oil. Better bring along some toilet paper if it is neccessary.

look up how to make sily putty on google.