Unfortunately none of them are signed or dated so I can't be precise about when there were made during 2006. Tough.
Nor can I say as much as I'd like about how they were made. Most were made within a group of three, and I'd like to have grouped and ordered them to show the progression and the breaks from progression. Oh well, can't have it all. I'll try and make more effort in the future to sign and date them.