They say the days are long and the years are short—ain't that the truth! When your little one has outgrown the crib (sniff sniff!), my Ambrose/Serenity Toddler Conversion Rail easily transforms your Ambrose 3-in-1 convertible crib or Serenity 2-in-1 convertible crib into a toddler bed—preventing your wiggle worm from rolling out during the night.