As well as working beautifully for one little person, the Egg3 stroller has also been designed to grow with your family so that your initial investment will last you through more than just your first bundle of joy. Whether you need transport for newborn twins, a baby and a toddler, two toddlers or your baby with a beloved furry family member we have got you covered. There is no compromise on the smoothness of the ride or the convenience to the pushing parent. The Egg3 tandem adaptors are designed with ease of use in mind, allowing you to build up and break down your egg3 stroller system in seconds. For twins or close in age siblings with use of tandem seats. Approved configurations using egg2® /egg3® tandem adaptors: Upper world facing seat unit, world facing lower carrycot Upper parent facing infant car seat (requires multi car seat adaptors), lower world facing tandem seat Upper parent facing carrycot (height adaptors optional), lower world facing carrycot Tandem parent facing infant car seats (requires multi car seat adaptors & lower multi car seat adaptors) Upper parent facing infant car seat (requires multi car seat adaptors), lower world facing carrycot Upper world facing seat unit, lower world facing tandem seat