Hai! At 10 months, baby mula nak explore badan dia, so tepuk-tepuk telinga and clapping adalah totally normal developmental milestones lah, it means dia sedang discover cause-and-effect and fine motor skills dia. Kalau dia lebih prefer sebelah telinga, bukan masalah besar, tapi kalau you notice dia ignore completely sebelah side atau ada ear discharge, better check dengan doctor just to be sure, especially since first-time mum kan, better peace of mind! Sayang, my few mum friends cakap anak diorang pun ada weird preferences at this stage, so jangan worry too much lah.