Now they aren't "standard unit blocks" but they are made up of lengths that are fractions of one foot. So eventually there will be a math component in play. I didn't see any real advantage of making them true standard unit blocks but then maybe the fact that I never had any as a child is the reason math comes so hard for me today. ;) Just kidding, mom. Regardless, they were well-received when the Monster woke up.
Now to check the scrap wood pile out back to see what else I can come up with.