Hi, I posted before about changing my 20mo old to a bed. I have just one more question on the topic...toddler mattress or twin mattress?? Do you think it makes more sense to gt a twin mattress (the ped. reccommended this for more room and we will eventually need it anyways) to put on the floor and eventually get a bed for, or do a toddler mattress that we have with a bed?? I know the toddler mattress is too small for him to have on the floor. He will roll off all night. So, just wondering what everyone thinks..Thanks