I dont know anything about Frame strollers... do they just work with the infent car seats? Or can you put a stroller seat in once they out grow the car seat?
They only work with infant car seats. We bought one from a resale shop for $15. I wanted one so I didn't have to use the bulky stroller all the time when DH isn't with me.
Re: another stroller Q
They work with the infant (bucket) carseats.
Look on craigslist, people sell these ALL the time since they are very handy, but you don't use them all that long. I got mine for $10.
This.