Since this is for Kindergarten, where transcriber’s notes are discouraged, I would keep this as simple as possible. Replace the picture with a simple shape as per the Guidelines and Standards for Tactile Graphics.
[quote=]“Picture objects (puppies, bunnies, flowers, etc.) should be represented by solid simple tactile shapes (circles, squares, etc.) and not braille shape indicators. … shapes must be grouped as they are grouped in print…”[/quote]
The guidelines also say that you should not use braille symbols for pictures in K-3. It is impractical to use words, since they may not be at that reading level. Use a heavy string (or thick solid line) for the "X" shown in print. Leave it to the teacher to offer any additional explanation, just as she would have to explain to the sighted students.