Choosing & Using a Sleep Trainer Clock

Children waking too early in the morning is a problem for the whole family. When children don’t get enough sleep overnight, they will be grumpy during the day. And when parents get woken up too is harder to cope with grizzly children! Unless you take action to teach your children to sleep in later in the morning, this vicious cycle can become a very firm habit.

Reasons for early waking & what to do about it:

How does a sleep trainer clock help?

How can the child tell it is morning?

It depends on the clock. With the Gro Clock the the stars display on the screen countdown and change the moon face on a blue coloured screen to a smiling sun on a yellow background.

Choosing which sleep trainer to buy

As with most things electrical, there is a strong element of ‘you get what you pay for’ and budget is always a factor. A sleep trainer clock is something you want to get a lot of worry free use out of. Only the sleep trainer clocks that meet our quality standards feature in our collection.

When considering which clock to get think about which clock you like and your child likes the look of as well as if you'll use it away from home. Sleep trainer clocks with a battery back-up are good options for when there's a power outage or when you're away from home as you don't need to worry about remembering the plug.


Sleep Trainer Clock Comparison Chart

  Claessens Gro Company Mirari Play Monster Claessens
  Kids Moon Clock

Gro Clock

OK To Wake Clock My Dream Comforter

Size (unboxed)

17 x 23 x 7.5cm  14 x 12.5 x 5.5cm 12 x 13 x 14cm 17 x 23 x 7.5cm

Mains powered

O O O  

Battery back-up

O   O O

USB powered


Digital clock readout


Go-to-sleep process


Wake-up process

O O O  

Wake-up time indicator

O O   O

Daytime nap setting

O O O  

Weekend setting


Optional alarm sound

O O O  

Optional white noise & lullaby


Soft night-light function with bightness control

O O O  

Suitable for newborns as nightlight*

O   O  

Suitable for 3 year olds+


Can be wall hung


 Can stand on chest of drawers

O O O  

 Changable clock face

O   O  

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 *Keep out of reach of children. Secure cable safely.

Here’s a summary of our current range: 


Gro Clock by Gro Company

Made by the gro company, makers of grobags, the gro clock is the top of the range. It is fantastic quality, with a great range of features. The backlit display shows stars which gradually go out over the duration of the sleep time, making it easy to judge 'how long till morning'. When it's time to wake the display colour changes and the moon changes to a picture of a sun.


  • Mains powered
  • Can have digital clock on or off
  • Can be used as a nightlight since it runs on power and it has 10 levels of brightness from no light to a bright blue glow.
  • Optional audio alarm
  • Can set different time for morning and naptime (or weekend) wake up.
  • Comes with a small story book to reinforce the 'stay in bed till the sun comes up' message.
  • A simple, smart looking clock that your child could continue t use as a regular alarm clock as they get older.


Kids Moon Sleep Clock By Claessens Kids

The original sleep trainer clock was designed in Switzerland by Claeseens Kids. You can use this clock from birth as a nightlight and sound machine.We recommend the sleep trainer functions from about 2 1/2 years old. In the evening, there is an adjustable sunset time, to show your child it is nearly time for sleep.

  • Mains or battery powered (mains recommended)
  • Uses 3x AAA batteries
  • 3 settings for night-time, nap time and weekend wake-up
  • 4 choices of alarm plus a silent mode
  • 4 levels of brightness
  • 4 choices of sound - 2 lullabies, fountain and uterine heartbeat



OK to Wake by Play Monster/American Innovation

Simply set the OK to Wake! for a time when you are happy for your toddler to get up in the morning, once the soft yellow night light turns green, that lets them know it's now OK to wake up. OK to Wake! is a simple to use, bedside alarm clock, nap timer and dual-colour night-light and comes with 2 interchangeable coloured face plates - 1 x flower & 1 x bug.

  • USB powered (mains recommended)
  • Uses 4x AA batteries (not supplied)
  • Adjustable volume & brightness
  • Snooze function
  • 3 Years old is the minimum age we would recommend this item
  • Interchangable face plates
  • Nap timer
  • Concealed control panel for parents


Kids Moon My Dream Comforter by Claessens Kids

The My Dream is not a sleep trainer clock in the same way as the others shown here but it is another tool to help you against early waking. The My Dream bunny will tell them whether it's time to sleep or wake rather than you having to. It indicates when it is time to wake-up and when it is time to stay in bed by lighting up the comforter's sleeping face or it's awake face with yellow or a blue light when the comforter is squeezed. The idea is that it is a friendly and intuitive way to convey that information to a little one.

  • Battery powered (mains recommended)
  • Uses 3x AAA batteries (not supplied)
  • Set the illumination time between 1 second and 9 minutes
  • 2 Years old is the minimum age we would recommend this item
  • Comforters are good sleep associations


Introducing a Sleep Trainer Clock

For the most effective introduction, we recommend you change the time gradually over the first week or so.

So if your child currently wakes for the day at 5.30am, we recommend setting your sleep trainer for say 5.40am on the first day. So after a short wait, they will see it is morning time. Congratulate them for waiting until the clock says it is time to get up. get up and start the day! Then set the clock for the next morning to wake up at 5.50am, and the next day at 6am.

And as with any sleep training, parental consistency is always the key! So while the clock will be an excellent tool, you can’t set the time for 7am tomorrow morning and expect that your child will instantly start to sleep in! You may need to go in and remind them to stay in bed until the clock says it’s morning. Or repeatedly put them back to bed or sit with them and wait until the clock changes. This initial assistance will pay dividends quickly. 

What age can I introduce a Sleep Trainer clock?

It depends a lot on the child but generally from about 2 years old. The key is when your child is able to understand what the clock means - for example, if the bunny is sleeping or the stars are showing on the clock's display, that means stay in bed . Or when your child can tell the clock being yellow or the bunny is awake means the day has started. The Claussens clock can be used as a nightlight from newborn so you'll have a trainer clock ready for when your little on is old enough to understand it. It can also be wall mounted to keep it out of reach of little fingers. 


Claessens Kids Moon Sleep Clock



Gro Company Gro Clock