LittleHippo Kelvin Color Changing Night Light, Room Thermometer and Hygrometer (Humidity Monitor) for Nursery, Baby’s Bedroom, Child’s Room
$29.99






From the brand

Sleep better. Parent easier.
Sleep better. Parent easier.
Sleep better. Parent easier.

We are a USA based company with a mission to create beautiful, modern children’s products. Our goal is to design products that customers wouldn’t necessarily think were children’s products at first glance, yet still bring delight to children everywhere. Most importantly, we set out to build high quality products – while keeping them affordable.
With LittleHippo products, we hope to make parenthood just a little bit easier.



How did we get our start?
In 2016, our family saw a need for well-made children’s electronic products. After 2 years in development, we launched our first idea on Kickstarter and raised 300% our funding goal!
What makes our products unique?
We create beautiful, high quality yet functional AND affordable children’s products. We are a USA based company that prioritizes service and satisfaction.
Why do we love what we do?
As parents ourselves, we are always looking for ways to make the job of parenting easier. We love hearing from fellow parents who have had success with our products!
COLORFUL ROOM TEMPERATURE MONITORING: KELVIN changes colors depending on whether the room temperature is too hot, too cold or just right! Red for too hot, Amber for just right, and Blue for too cold.
HUMIDITY CONTROL FOR HEALTHY LIVING: Keep your family’s health in check with KELVIN’s built-in hygrometer. This digital humidity monitor ensures you’re always aware of your room’s moisture levels, guarding against congestion, stuffy noses, and dryness. Maintain an ideal indoor atmosphere effortlessly.
PERSONALIZED COMFORT CONTROL: With KELVIN, effortlessly align the temperature range to match your physician’s guidance through its user-friendly interface, putting your family’s comfort squarely within your control.
FROM NURSERY TO NIGHT LIGHT: A beloved choice on baby registries, KELVIN is an indispensable tool for monitoring temperature and humidity during those precious early months. As your child grows, KELVIN seamlessly transforms into a comforting night light, ensuring a soothing atmosphere in the nursery or bedroom.
DURABLE AND SECURE: Rest easy knowing that KELVIN by LittleHippo is built to last with its robust, child-friendly construction. It holds a series of safety approvals, ensuring the utmost protection for your little ones.
13 reviews for LittleHippo Kelvin Color Changing Night Light, Room Thermometer and Hygrometer (Humidity Monitor) for Nursery, Baby’s Bedroom, Child’s Room
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Day Gomez –
Great product and amazing customer service
The cutest and one of the most useful little thing in my son’s nursery. The size is perfect, the colors are great and works great as a nightlight as well! My husband and I love being able to know my son’s room temperature just looking at Kelvin and checking on its color. I also must say a huge thanks to Stephanie for the best customer service I ever had!
Cathleen –
Great value, works well.
Easy to setup, just plug it in and it’s all set to go. The humidity monitor is a nice feature. I bought it because the baby monitor was reading very high temperatures in the nursery so I wanted to make sure it was correct.I really like the soft orange glow when the temp is in the comfortable range. It’s light enough to walk around but not so bright it’s distracting- I like it better than the sound machine/nightlight I have. The colored glow makes it easy to just peek in and make sure the temp is fine.Great product for the money and it’s cute.
Kelly Osborne –
Perfect (and Cute!) Temp/Humidty Reader
So, I don’t have a child.. but I do have an office that’s ice cold. I’d finally had enough of it being so cold and them telling me “the temp is set to 70, there’s nothing we can do or people will be too hot”.. SOOOO here came THIS unit!(For the record, I’d searched for other indoor thermometers and saw good reviews but also some Not so good reviews, even for the expensive ones. Because I just wanted one that simply Tells the Temp (and humidity) I decided on this adorable little unit.)Once received, all you do is Plug it in and it works, immediately. You don’t have to get it set to the area or room or anything of the like, it simply works. Which I loved about that. It also shows the temp.. and changes colors Immediately, once it gets to the “comfortable” range!Because of this unit, when I first get in, in the morning.. it’s still icy… BUT.. my office has began to turn up the temps for the day so my Kelvin just keeps on rising and getting to the “comfortable” range! (As shown in photos.)So of course, this would be ADORABLE for a Baby/Childs room.. equally as adorable for a desktop thermometer in an office!Would definitely purchase again and is now going to be my new “gift” to give for all of my friends that are having babies!!
JJ –
This gives the perfect amount of light while also monitoring the room temperature
We love the LittleHippo Kelvin! It works perfectly as both a thermometer and a night light. The color-changing feature is fun, and the brightness is just right—not too harsh, but enough to gently light up the room. It’s also really handy to be able to check the room temperature and humidity at a glance.Our first one stopped working after about a year, which was disappointing, but we couldn’t find anything similar that we liked as much. We ended up buying another one because it really is that good! Overall, it’s a well-designed, practical, and cute addition to any nursery or child’s room.
D.H –
Adorable, easy to use, works well
Really great night light for a kid’s room. We originally had the gro-egg, but decided to give this one a try for our newest born.The KELVIN is so much better in many ways: 1) it’s cheaper, 2) you can toggle between Fahrenheit and Celsius (which is great since we use F in the US and gro-egg only comes in Celsius), 3) comes with a US plug, 4) you can actually choose your temperature ranges, 5) and it even displays humidity.I did a test to see if the product had accurate reading levels. Temperature showed 1 degree difference compared to my thermostat. Humidity level seems right given that we use a humidifier, although humidity levels can have a much bigger variance than temperature. But as long as it’s within 5%, it’s probably okay.It is more expensive than a regular night light but you’re getting a lot of features, so in my opinion, it’s worth it.
Itai –
Clear and easy indication of room temperature
Our son was born a little over a week ago and this little thermostat has given us peace of mind with all regards to the room temperature. Our house runs a little cool so we’re using the heater to make it much warmer for baby, but at the same time you done want to go too much, so that’s where the Kelvin color changing night light comes into play! This is very easy to use as it clearly indicates whether the room is too hot, too cold, or just right. There is also a humidity gauge for anyone who wants to know the moisture levels in the room. The light itself is not too bright, but enough to see the baby in a dark room, so you can feel safe while getting some necessary shut-eye. Overall, great product. Will very likely buy another one for the living room as well!
Zimmy –
Temperature reads different when the light mode is on
I liked it at first, until I realised turning the blue / orange / red light on changes his temperate! The light on makes him read bitter and light off makes him read cooler – flaw in the design
APP –
Great little thermometer!
This is such a cute little thermometer. I purchased it to go in my daughter’s nursery. It works great and is super cute. I love that the lights change color based on the temperature. All of these in theory are fantastic until you have it in a pitch black room and the lights are SO BRIGHT. Although I love it I have to look for something that won’t be as disruptive.
O. Havrysh –
The night light isn’t very bright. I like the design. I don’t think it’s bright enough for changing diapers, but it’s enough to see if the baby is sleeping.The color-changing mode can be turned off at night, and it will emit a soft white light that won’t disturb sleep.It would be better if it had a multi-country adapter. You’ll need a USB adapter. Only the US adapter is included.
Jen –
Love this little guy! Super cute, great nightlight, and piece of mind for me knowing that our baby’s room is at the right temperature with just a glance. Easy to use. Very happy with this purchase.Only issue is that my daughter constantly wants to play with it…..it’s now stationed out of her reach lol!
HedgieMomma –
We have this in our bedroom and we love it. The light let us know what temperature our room is at all times. This helps us to know how to dress the baby. It seems very close to the right temperature when we compared it – so we rely on it lots. I like that I can roll over in the middle of the night and just see the light and know if our room is too hot or not. It has the digital temperature on the top of it. If you want to read it the light isn’t too bright if it bothers you you can always cover it with a light blanket.
Jordan belmontes –
no complaints at all serves its purpose & easy to use
Amazon Customer –
was a gift and she love it