気(き)が向(む)くto feel like, to feel inclined to do

気(き)が向(む)いたらピアノの習(なら)い事(ごと)を再開(さいかい)します。

I will resume my piano lessons when I feel inclined to do so. {to feel like, to feel inclined to do}

母(はは)：「気(き)が向(む)いたら、いつでも電話(でんわ)をしてね。」

Mother: "Feel free to call me anytime when you feel like it." {to feel like, to feel inclined to do}

息子(むすこ)は気(き)が向(む)くまでご飯(はん)を一口(ひとくち)も食(た)べようとしない。

My son won't even try to eat a single bite of his meal until he feels like it. {to feel like, to feel inclined to do}

ようやく気(き)が向(む)いたので、ダイエットを始(はじ)めようと思(おも)います。

Since I finally feel inclined to do so, I think I will start dieting. {to feel like, to feel inclined to do}

先生(せんせい)：「生徒(せいと)自(みずか)ら気(き)が向(む)くまでは、私(わたし)が勉強(べんきょう)をしろと言(い)っても無駄(むだ)である。」

Teacher: "It's pointless for me to tell students to study until they themselves feel like or are inclined to do so." {to feel like, to feel inclined to do}