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
More to consider
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Customer reviews
1,028 Ratings
1-10 of 1,028 Reviews
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
Love this stroller! Perfect for walks as the weather is getting better. Fits both babies perfect. Just the right length and width to make it through stores easily
Apr 16, 2026
2nd Seat Kit 2.0
I was very disappointed with this product. The base stroller I had previously purchased wasn’t made to accommodate this 2nd seat. Doesn’t fit! Doesn’t appear I can return this seat or purchase a base stroller to make this work.
Apr 16, 2026
Great Addition
Easy to order, easy installation, easily meeting the needs of our family. Love the extra long sunshade and all the other features!
Apr 15, 2026
Just what we needed now that we have kid #2. It was pretty easy to set up for using the car seat for baby (we already had the adapter) and the seat for the big kid. It definitely makes the stroller heavier to push and more challenging to maneuver, which is hard in early postpartum days, but we’re getting used to it. Love having both kids in one stroller that is not double wide.
Apr 14, 2026
2nd Seat Kit 2.0,
The 2nd seat kit 2.0 was given as a gift,
Apr 11, 2026
Missing canopy
The seat is good but when we opened the box the canopy was missing. We bought our seat a few months in advance to prepare for our new baby girl. We were disappointed to find it missing from the box and it seemed too late to ask for a return.
Mar 31, 2026
Mockingbird second seat Review
Mockingbird second seat is everything a mother needs for their kids. It makes things easier for me whenever my two kids fell asleep while shopping. I am enjoying my mockingbird complete stroller. Thanks.
Mar 28, 2026
Best Stroller ever!
I was always between this stroller and the side by side ones and seeing people in public struggle with the side by side ones while mine is so easy to move around makes me so glad to have chosen it. I’ve already recommended it to all my friends expecting little ones.
Mar 27, 2026
Not really happy
So many parts to set it
Mar 25, 2026
