I don't have older kids but I did work in daycare and kindergarten for awhile and it really is like pulling teeth!! The thing I always noticed that made a difference when they're still relatively young (obviously this would not work with teenagers hehe) was to sing a song (do you know the clean up song?) and do it with them. Don't do it all by yourself, but as long as they're helping, you can help them too! HTH! Good luck!!!!!

__________________