Yes, with two car seat adapters, you can attach two car seats to the Mockingbird stroller frame. However, Mockingbird offers more options for two infants. You can use one infant car seat with adapters and one toddler seat with the infant inserts they sell separately. Or, you can use two toddler seats with two inserts. But, if you insist on installing two infant car seats, you can do so, but as I mentioned, you need to buy two car seat adapters. Unfortunately, you cannot use two bassinets at the same time.