Stokke's Yoyo³ is an all-in-one frame that grows with your child from birth to toddler. Start with this frame, and then add on the newborn solution that best fits your needs: 0+ newborn pack or shell (sold separately). Then, when your child is ready to discover the world and facing the road, pick the 6+ color packs (sold separately) and transform your Yoyo³.