Just received a "what is love?' email from my sister-in-law.
Supposedly said by little kids, I think these comments were made up by an adult. I think the survey of little kids is bullshit, but maybe that's just me.
Most of them are pretty mushy but these I thought were good:

When someone loves you, the way they say your name is different.
You just know that your name is safe in their mouth.

Love is what's in the room with you at Christmas if you stop opening
presents and listen.

If you want to learn to love better you should start with someone who you hate.

You really shouldn't say 'I love you' unless you mean it.
But if you mean it, you should say it a lot. People forget.