Did anyone put your newborn or infant onto a normal mattress to sleep instead of a baby cot? What do you think of using mattress because it seems more practical that way.

I guess it’s your personal preference? 😄 For us, baby started sleeping on mattress in her own room when she was 6 months old onwards. Before, she slept in cot. We placed 2 single sized mattress side by side so she got more space to flip or be in whatever creative position she likes. Then we use door stopper on our and her door to prevent the room door from closing totally. So when she wakes up, she can straight away crawl to our room by herself.