I built my daughters twin from that anawhite site. Its super cute, it was easy to do. she went from crib to twin and it was a super easy transition. Glad we didnt waste money on a toddler bed.
We wqent right to a double bed at 12 months for my two older girls.
My 16 month old is on a floor bed. Its a wodden floor frame cause she is not 100% walking on her own yet.