Not knowing [what to do], I blankly stared at the fountain.

Stick out your tongue.

to bite one's tongue

Items to be used near the stove should, first of all, be suitable and convenient to handle by hand.

The child stuck out their tongue jokingly.

In the photo, Kang Yu-ju was sitting on the floor, looking up with unfocused eyes and sticking her long tongue out. Aka the ahegao facial expression.