In kindergarten, The Teacher tells that Tickling can 2 people to tickle everytimes... So Every babies could already pairs & tickles each other but Baby F (Baby Felix) saw Baby N (Baby Noah) is asleep all alone until... He could takes Baby N (Baby Noah)'s shoe & sock to tickle him

Baby F (Baby Felix) : takes Baby N (Baby Noah)'s one shoe & sock to tickle him so baby babbles Baby Felixy could tickle Baby Noahy's one feet!