We took the prototype to 3 year old Grace to see which options she would choose and how she would react to the costume. It was presented to her in both boxes and she opted for the pink box. When asked if she wanted to try the other side of the costume she said no.
We found Grace to be very shy when we were there, and it took a long time for her to sit in the same room as us. This shows us that next time it may be best for us to hand the product to the childs parents and ask them to record for us.