Please note: the Stokke Xplory Sibling Board is not compatible with a Stokke Xplory with a serial number lower than 113464. The serial number can be found under the stroller between the front wheels. Let your stroller grow with your family. The Stokke Xplory Sibling Board allows your toddler to ride right alongside his or her sibling. Designed for children approximately 2 years to 20 kg. The Sibling Board connects to the Stokke Xplory stroller and remains attached when the stroller is folded. Keep your family close with the Stokke Xplory Sibling Board. Stokke Xplory Sibling Board