The Children's Antics are Very Entertaining to him.
Should he be a Responsible Uncle and tell Jake and Neytiri about them? Probably but then what else would he find as fun to watch?
"ʟᴜ ᴛꜱᴀᴛꜱᴇɴɢ 'ᴜᴏ ɴɢᴀ ɴÌʀᴀɴɢᴀʟ ᴛꜱᴏɴᴛᴀ ᴘᴀᴡᴍ ᴏᴇ ᴛꜱᴀ'ʜɪᴋ? ᴏᴇ ʟᴜ ʟᴇꜰᴘᴏᴍ ᴛꜱᴏɴᴛᴀ 'ᴇʏɴɢ ɴɢᴀ"
(Is there something you wish to ask me Tsa'hik? I am happy to answer you)
He Offers her a Bright and Friendly Smile when he Notices her Staring at him.