If you’re happy and you know it, clap your hands... is what we sang in nursery school. 

But this little ‘Not-Yet-A-Baby’ already knows the ditty! Even inside the womb, this baby started clapping when the parents went for an ultrasonography.

Reddit user Fishtails and his wife were surprised when their unborn baby started clapping during their 14 week ultrasound.

Unborn babies usually start movements around 25 weeks, so this little one in the ultrasound surely is an early bird!

In fact, when the parents started recording the ultrasound, the mother started singing which made it feel like the baby was responding to the rhythm of the song. How cute is that!