Can a toddler seat fit into the Nuna Mixx Next?
I am not sure what you mean. The Mixx Next has a seat unit, which is meant for toddlers. It is not huge, so perhaps up to 2, 2.5 years, it can fit your child comfortably. Apart from that, a car seat or a carrycot can fit on the frame (a car seat needs adaptors). Only a 0+ car seat - capsule style fits the frame, nothing larger will fit. No other click-on accessories work with the Mixx Next apart from the capsule, the seat unit and the bassinet.