I've never used a ham. Will have a look for a printable pattern I can download & try it on one.
I wouldn't have done them all today but I reeeeeeeally want to start on the Elsa dresses tomorrow. The girls played out all day, dp's watched sport all day so I had peace and quiet to fiddle to my hearts content 
There are a couple of bits where it's noticeably folded rather than eased into the hole (iyswim) as I've stitched but I don't think 8yo's are going to look that closely.