Please everyone, keep calm.
As mentioned in the game description, the recommended age for the Kid Mode is 3+. Toddler is generally a term used for 12-36 months children (source: https://en.wikipedia.org/wiki/Toddler). Thus, “kid” mode seems more appropriate here to me. “Child” mode could be an appropriate alternative, but I preferred “kid” for no specific, nor scientifically accurate, reason.
Thanks everyone for participating this very important discussion.