2nd Seat Kit 3.0
$
175.00
Free shipping & returns for Babylist orders $45+
color
Black
1
Overview
Description
The 2nd Seat Kit allows you to expand your Mockingbird Single-to-Double Stroller (sold separately) into a double stroller.
The kit comes with a 2nd stroller seat, as well as a set of adapters to make room for two riders.
If you’re planning to stroll with one of your kids using the bassinet or car seat adapter, you’ll still need the adapters to convert to double mode, and then you can start using the 2nd stroller seat when your child develops head and neck control (typically around six months).
The seat in Mockingbird’s 2nd Seat Kit is identical to the seat included with the Single-to-Double Stroller. This means you can stroll in double mode with two kids up to 45 lbs, and you can choose to have your younger child closer to you.
It also means that the 2nd seat has all the features of the Stroller seat, including the FullShade system, which pairs the XL UPF 50+ canopy with the built-in LegShade for head-to-toe coverage sun coverage.
Other parent-favorite features include the magnetic buckle, height-adjustable canopy, reversible seasonal seat-liner, reflective piping for safer nighttime strolls and more in-seat storage.
Note: To stroll with twin infants, you’ll need the 2nd Seat Kit plus two Car Seat Adapters or two Infant Seat Inserts, as the Single-to-Double Stroller is not compatible with two Bassinets.
What we about it
Expands your Single-to-Double Stroller to double mode in under a minute, no tools required.
Details
- What’s included: Seat, Upper Adapters (to raise your 1st Seat and make room for the 2nd) and Lower Adapters (to attach the 2nd Seat)
- Max. child weight: 45 lbs in each seat
- Compatible with the Mockingbird Single-to-Double Stroller (all models)
- Cannot be used with the Mockingbird Single Stroller
- Babylist exclusive: Heather Grey
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Customer reviews
1,038 Ratings
1-10 of 1,038 Reviews
Best investment
I bought the second seat for when my niece visited and it’s the best investment/decision made. So easy to put together and might be a bit bulky to collapse but so worth it and not dealing with two strollers.
Apr 28, 2026
2nd seat
We just took the two seater to Disney and it’s not something I want to do again. It was very frustrating to have to take the seat apart every single flight and ride we took to and from the park. Also the both canopies didn’t hold up.
Apr 23, 2026
Love the new seat
I love the extended canopy and how easy it is to adjust the straps!
Apr 22, 2026
wish i could just buy attachment
Good! I wish there was an option to buy the attachments without the second seat
Apr 22, 2026
We love our mockingbird!
We had our second baby and ordered the additional seat and are so pleased! It is so easy to use and aesthetically pleasing. We love mockingbird products in our home. I highly recommend!
Apr 22, 2026
So grateful for this stroller!!
I already loved this stroller so much but this 2nd seat kit, and how easy it is, has made our transition to two kiddos a little bit easier! Our older one loves that he can face the baby and “keep an eye on him” 🥰. Excellent purchase, we are so happy!!
Apr 18, 2026
The Lifesaver
I love my Mockingbird stroller and now that my family is growing, I love that our stroller grows with us. The lightweight frame makes it so easy to maneuver around parks, grocery store isles, or the crowded farmers market. I will always recommend this stroller.
Apr 18, 2026
Simple and Easy 2nd seat addition
Very happy with the conversion kit and how easy it was to assemble to convert my single mockingbird to double!
Apr 18, 2026
It’s great!
Easy to put together which is so nice when you’ve just had a baby and don’t want to do hard things. The stroller still pushes very smoothly and everyone is comfortable!
Apr 16, 2026
With the second edition added to our family, the 2nd Seat Kit was a must. It has been rather helpful to have 2 seats available for my kiddos. However, I do have some inconveniences with the overall functionality of the stroller with 2 seats. 1. When it is in 2 chair mode, it is almost impossible to fold it up with both seats and store it in a vehicle. I have been removing the seats each time we put it in my SUV that has plenty of space. 2. There is not as much range in the individual seats in…
Apr 16, 2026
