Fisher Price Laugh & Learn Learning Letters Mailbox Sock sensor included?_Yes "This set of UPPAbaby Car

"This set of UPPAbaby Car Seat Adapters allows you to fit your infant car seat to your stroller

and it provides enough space for up to 3 little ones to play at once

"Help your kiddo stay in bed longer and develop a great sleep cycle at a young age

It starts out as a classic baby bouncer and converts into a rocker and toddler seat

Fisher Price Laugh & Learn Learning Letters Mailbox Sock sensor included?_Yes "This set of UPPAbaby CarCondition: Gently Used "Youve got mail! Babies and toddlers can have their own mailbox to send letters and small packages to their loved ones. The songs and entertaining music will keep them learning and having a blast."