Our son was born last year in December, and we've been using the Doona with a car seat base in each car. It's been excellent!

But he'll be too big for it in probably a couple months and we also have bub #2 due this December. We'll use the Doona for bub #2 but is there a travel system out there with separate car seat bases that fits toddlers? Everything I see is supposed to be for infants.

We also have a second hand Bob Rambler, and I guess we could just get a toddler car seat, but I have really loved the convenience of the Doona plus I don't see a lot of toddler car seats with separate bases, which really works well for us.

Recommendations and warnings both appreciated!