I'll have to use that analogy,
. Maybe the memory trick would work better if you said B has a Butt and D Doesn't.
Ya'know sounds association and such,
, but I'm going to have to try that analogy on some of my reading students.
We ARE talking about lower case right?
Also if your child could work with B's and D's that also carry other characteristics. (B with the bump looking like a ball and a d with a dogs face on it) You could draw a stick person to illustrate the belly/butt of B and D, other wise I can't see how remembering the words for that analogy would help. Depending on which way the person is standing, it could be either.
Also, you might try tracing the letters in the dirt, dry rice, sandpaper letters etc, until you get to the point that you could blind fold your child, and have them trace a letter and identify it
I knew them all in words, but in isolation I confused b and d, and sometimes other letters also. The only thing I didn't have trouble with was L and 7, thank god!
B and D were the worse, I would mix them up until I was in highschool and even now, but a lot less rarely. I have trouble with flipped shapes and such. the <> also confused me, until in Inter. Algebra in college, I was taught to think of each as the tip on the number line.
I don't know why, I just did.