THREE RHYMING RIDDLES

1)
I float on the water and carry just one,
I'm used for work and I'm used used for fun;
Back to front I look the same,
And, come to think of it, so does my name.

2)
What runs, but never walks,
Sometimes sings, but never talks;
Has a face, but no eyes to see,
Has two hands, and sometimes three.

3)

In spring I am gay in handsome array,
In summer more clothing I wear;
When colder it grows, I fling off my clothes,
And in winter in truth I am bare.

Answers:
1. A kayak
2. A clock
3. A tree