Big Kid

for children 30-110 lbs. / 4 years and up

Big Kid Booster Car Seat

$24.00 - $60.00
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Our Big Kid high back boosters are designed for children 30-110 lbs. Once your child has reached the size and age requirements, you can transition into the no-back version of this seat.

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Trusted by Millions of Families for Nearly a Century

Made in USA with US & Global Components

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Warranty: 90 days

Returns: 30 days


Installation Manuals: Browse »

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Why You’ll Love it

Go big or go home...

Perfect for your growing child, this seat belt booster combines the peace of mind parents require, with colorful options your child will love.

Product Details

Child Specs (30-110lbs)


  • Weight: 30 lbs-110 lbs (13.6-49.8 kg)
  • Height: 40-57 in. (102-145 cm)
  • Age: at least 4 years of age
  • Fit: Top of child's ears are at or below the top of the child restraint.


  • Weight: 40-110 lbs. (18-49.8 kg)
  • Height: 40-57 in. (102-145 cm)
  • Age: at least 4 years of age
  • Fit: Top of child's ears are at or below the top of the vehicle seat headrest.

Product & Shipping Specs


Safety Testing

At Evenflo, we continue to go above and beyond government standards to provide car seats that are tested at 2X the Federal Crash Test Standard.

  • Side Impact Tested: Meets or exceeds all applicable federal safety standards and Evenflo’s side impact standards.
  • Designed and tested for structural integrity at energy levels approximately 2X the federal crash test standard.
  • FMVSS 213: Federal Motor Vehicle Safety Standards for Child Restraint Systems
  • FMVSS 302: Federal Motor Vehicle Safety Standards for Flammability of Interior Materials
  • CMVSS 302: Canada Motor Vehicle Safety Standard
  • CMVSS 213: Canada Motor Vehicle Safety Standard
  • Evenflo Temperature Testing: All current Evenflo car seats are tested for product integrity at both high and low temperatures.

Use & Care

Use & Care

Read all instructions and warnings on the product, product labels, and instruction manuals before use. Consult your vehicle owner’s manual to determine proper placement of child restraint in your vehicle and familiarize yourself with your vehicle’s components.

Browse Instruction Manuals »

Cleaning Instructions
  • DO NOT lubricate or immerse in water any part of this child restraint, unless rinsing is permitted
  • Plastic and metal parts may be wiped clean with mild soap and water and dried with a soft cloth. Do not use abrasive cleaners or solvents.
  • Take care not to damage any labels.
  • The harness can be wiped clean with mild soap and water. Allow harness to air dry.
  • Machine wash the seat pad separately in cold water, delicate cycle. Tumble dry 10 to 15 minutes on low heat.
  • Periodically inspect and clean the restraint's crotch buckle of food, liquids, and other debris to ensure proper latching. Place the buckle in a cup of warm water and gently agitate the buckle back and forth. Press the red button several times while the buckle is in the water. Do not submerge the harness strap. To avoid damage to the buckle, do not clean the buckle with soap or detergents and do not use a lubricant.

Evenflo Big Kid® LX Belt-Positioning Booster Product Tour

Our Big Kid high back boosters are designed for children 30-110 lbs. Once your child has reached the size and age requirements, you can transition into the no-back version of this seat.
Big Kid Booster Car Seat is rated 4.5 out of 5 by 51.
Rated 5 out of 5 by from Space saver I bought this booster seat for my daughter a couple months ago and I love it because the price is affordable, it’s space saver in my compact car and it keeps my daughter safe plus the colors are fun. I also love the fact that I can pull the back rest up or down to accommodate to my daughter’s height.
Date published: 2019-06-08
Rated 5 out of 5 by from My Kids Love Their New Boosters! We are so happy with our purchase of 2 of the Evenflo Amp Booster Car Seats! It's a high quality booster seat with an affordable price. That is not very common to find these days in car seats but Evenflo has done it! My children were ready to upgrade from the 5 point harness seats and after a bunch of research these seats were the best choice! They're very stylish, modern, and look great in my SUV! My kids are so excited when we run errands so that they can sit in their new seats! The first day that they arrived, they sat in them in the living room for almost an hour watching cartoons! So I'd say they're very comfortable! The safety features ease my mind! Plus assembling it was extremely easy! I've been and will be purchasing more Evenflo products for years to come!
Date published: 2019-04-09
Rated 5 out of 5 by from Excellent car seat Thanks to friendly helpful customer services issue with order was resolved fast and received seat. Grandson loves it and says it’s very comfy! Great knowing he is comfy and secure!
Date published: 2018-10-23
Rated 5 out of 5 by from Good booster deat CAme quickly. Looks good. Was what our daughter told us to get.
Date published: 2018-09-18
Rated 2 out of 5 by from Example: Great features! I purchased two of these car seats. I do not like the way it fits in the captain chairs in my vehicle. It seems like this seat would be a better fit in a vehicle without captain chairs as the booster chairs wobble around a bit. Makes me feel that the booster is not that secure. If I had to do it all over again, I would not purchase these booster chairs.
Date published: 2018-06-25
Rated 5 out of 5 by from Great Value! Works Well. We have twins and 2 vehicles, so we ordered 4 units. They arrived quickly. Assembly was easy and installation is even easier. They just sit on the seat and are held in place when the child is strapped in. Kids love them.
Date published: 2018-06-24
Rated 5 out of 5 by from Great Car Seat My son is turning 7 next week and he had met the max on his convertible booster. I was going to have to take the back off and only have the booty part. We travel a lot and I wanted him to have the head rest for when he falls asleep. I got to looking and found this car seat. It was an amazing price so I thought even if I didn't like it I wasn't out a lot of money. It comes in a small box and VERY easy to put together. So easy to install in the car. We've only had it for about 2 weeks so I haven't had time to see if there are any complaints. This is our 4th car seat and at this moment would recommend it.
Date published: 2018-06-15
Rated 1 out of 5 by from Terrible construction We bought this seat for our child transitioning to a booster. The center section styrofoam "wing" snapped off because there is no support behind it. Evenflo replaced it for free, however it snapped off again. Needless to say, it's definitely not worth the money.
Date published: 2016-05-13
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