We aren't quite there yet with DD2, but with us planning on moving within the next year or two we have started to discuss the furniture we will need to buy. This includes a bed for DD2 as she's in a crib now. What size of bed did you start your toddler out in? We did a twin with DD1 but then a few months later moved her to a full, it was necessary! I think we will start DD2 out with a full right away so it will just grow with her.