I have no suggestions for you really but I do feel your pain. In my experiences I too have found that the older ones are more difficult than the younger ones. They have attitude and I find they get the younger ones wound up or get them to do things that they know they shouldn't be doing. I have just found that I have to keep age appropriate things around the house for them to keep them busy. Simple word games work well because you can do them with nothing, on the spot, all the while being able to be with the younger ones too (e.g. name things that start with the letter 'B' that are breakfast foods, list types of animals that start with the letter 'T', etc). They like things like hangman or activity books too. Definitely a challenge though because they seem to need more attention than the younger ones.