Depends on the kids. If they are open to listen and understand, then explain to them this is your "toy" and it's very easy to break and cost lots of $ to fix so please don't touch. Or, you can have them "safely" touch buttons and stuff "under your close supervision" until the mystique/curiosity wears off and they are no longer interested. Maybe tell them not to touch unless you are around and they ask permission with close supervision.
