The Gro-Clock Sleep Trainer is £19.99 at Amazon right now. I know of parents who literally can't get through the night without this clever little gizmo - I even know one couple who forgot to take theirs on holiday with them and went to extraordinary lengths to get one rather than suffer their child trying to wake them up for the day at 5am.
This isn't the best ever price - we've seen them featured for as little as a tenner before but that's a real rarity these days, so this aint bad.
The Gro-Clock helps children understand when it's time to get up and - crucially - when it's still the middle of the night. So you don't have to bark at them to get back into bed at 3am anymore.
The gently-glowing screen features images of stars which go out one by one during the night until the sun appears, indicating when it's ok to get up.
More than 1,300 Amazon customers have rated this an amazing 5 out of 5 stars, too, so it seems like it could be worth a try if you've got a persistent early riser on your hands.
After all, £19.99 seems like a small price to pay for the chance of a lie-in!
If you've got one of these, we'd love to hear from you on our Facebook page about whether it's worked. Leave us a comment...