Need a second seat on your egg stroller simply use these egg adaptors along with an extra tandem seat and there you have it a tandem stroller the egg tandem adaptors are perfect for if you need to add an extra seat to your egg stroller this egg tandem kit converts your egg stroller to a tandem stroller suitable for twins baby and toddler siblings the following variations are available with the tandem adaptors 2 forward facing seats 2 carrycots facing inwards to each other 2 car seats bot