Best easy riddles for kids with simple answers

What does this rebus say? XLR8.

Had at work day and night, it counts the numbers over and over. Although it counts all its life, it never gets past twelve.

Dipping, glinting, gliding by, Rainbow-fretted, wrought of breath. I live only while I fly – Earth’s rough kiss my sudden death.

Some months have 30 days, and some months have 31 days. How many have 28?

I'm a soft and furry pet. I have four legs and a long tail. I have sharp teeth and claws. I like to chase mice. I am a...

I have a face but no eyes, hands but no arms. What am I?

Our dinner guests cry that we are evil, when they notice their place in the meal. But its no big deal why; we are just one big happy tribe! And we get really fed up with people! Who, What or Are we?

I have four legs. I live in Africa. I am big and grey. I live in the river. What am I?

What goes up when rain comes down?

It can't be seen, can't be felt, can't be heard and can't be smelt. It lies behind stars and under hills, and empty holes it fills. It comes first and follows after, ends life and kills laughter. What is it?