I know the whole big bed transition thing has been covered quite a bit but what I've never seen is discussion on mattress choice. Bedding choice was easy - not much doubt which one DD liked best in the shop yesterday

What do you choose for a mattress that will hopefully see her through for many years? I'm a huge believer that there are some things that just shouldn't be compromised on for kids and a good mattress is one of them, but I don't know what that is for a toddler through child. Not as if something that's comfortable for me will necessarily be comfortable and appropriate for my daughter's growing body.

So, any advice would be great.