Join Nanogirl as she takes a trip to Auckland Zoo to find out what the smartest animal is.

Nanogirl heads to Auckland Zoo with Reuben and his mates from Ponsonby Intermediate, to find out what the smartest animal is.

Could it be a kea? Or a seal? Or maybe it's an elephant!

Watch the video of the experiment here.

For a print-out of this experiment, please click here.

Go to this episode on rnz.co.nz for more details