Pictures:

What happened when a tree doctor put the bark of an oak tree on a maple tree?

It didn't work, because he was barking up the wrong tree.

2504

Why is it difficult to be brave in the North Pole?

There's a tendency to get cold feet.

3227

What construction machine is named after a bird?

The crane.

2203

Why did Jimmy wonder where the planet Noyd is?

Because his mother said she was a Noyd.

869

Why did the telemarketer use his clavicle to rest his headset?

Because that's his caller bone.

1063

What can be the problem with a dynasty?

The word ends with nasty.

2420

What do you call a scientist who measures how big things are?

A size-mologist.

143

Why didn't Bill have a good vacation?

By mistake he went to a hostile instead of a hostel.

669

Why did Beth wear sneakers when she did the wash?

In case the colors would run.

1803

Why did Bill and Nancy marry each other?

They found each other engaging.

2444

What does this picture represent?

Mind over matter.

723

Why couldn't Katy find her grocery list?

It was a running list, so off it went!

1095