If form of publisher's name varies on the individual pieces, pick one form and identify in a note where the publication information was taken from. Use whichever method is most appropriate for the item. If not practical to list all the pieces can use a general term. If this method is used a 500 note should be included if practical to list the components of the kit. When giving the measurements of the container it is height times width times depth.
Kits often have many notes.
If individual pieces have separate titles considered important those should be included in a note and an added entry made for the titles. Might want to use notes to further explain the contents of the kit, or to give more information about some of the contents.