Just read those website that I've posted and ask questions. The most important thing is to put them into a container. I use a deli lid top. I put the leaves on the deli lid and then put that into a larger container. Under the deli lid, I place a damp papertowel for humidity. The new caterpillars will crawl over and eat an another egg, so you have to watch and when one hatches remove it to a separate container. I usually try to separate them by instar. http://www.monarchwatch.org/rear/index.htm
Monarch Life Cycle
Shows the instars
Best not to move caterpillars, but move them on the leaves. They could be molting. They will rest up to a day when they do this. If they are on the side of the container, leave them there. I usually just clean around them. They put down a mat of silk and attach themselves and then crawl out of the old skin.