I'd invite you to come to my school and spend 1 hour in a classroom on each grade level and you will be able to answer your own questions

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We have 5 classes of PreK and 4 classes of Kinder. Yes they have accidents and yes they eat like wild animals, baby wipes are a must for bathroom, snack, and lunch times. Older grades also use them to wipe hands and desk after snack. Baggies are used to put lost teeth in so they make it home, any supplies after the kids destroy the boxes they come in, math and reading station games and their materials, to separate supplies and hand out an individual baggie of whatever to each child, to put their device login card in so it isn't destroyed day 1, etc. The school doesn't give teachers cleaning supplies so the Clorox wipes are to wipe down spills, vomit, pee, snot and to give the room a wipe down daily to help keep germs down. As far as going through pencils and crayons, yes they go through them incredibly quickly. Even after the parents send in the required amount the teachers will spend their own money replenishing. I went into a 1st grade classroom yesterday and a little boy had a baggie of crayons that were broken and had all the paper torn off of them. This was day 8 of school. I asked him what happened and he said, "It was an accident" lol.