We have a 6 month old little boy. His baby mattress has a side that's firm (for infants) and a side that is soft (for toddlers.) He's about 19 lbs (last time weighed) and I am wondering when should I flip his mattress over.
But more generally, for future reference, when does child stop being an infant and becomes a toddler?
The reason why I asked this is that I want to know the transition period from when a child stops being an infant and becomes a toddler. I figured that a toddler stops being a toddler around 3 - 4 years and my kid is nowhere near there.