What is it?
It's (long, green) seaweed.
What are they?
They are fish bones.
What is it?
It's a (pink) sun hat.
What is she?
She's a lifeguard.
What are they?
They are waves.
What are they?
They are (tiny) minnows.
What is it?
It's a (red) pail and a (yellow) shovel.
What are they?
They are seashells.
What is it?
It's a sand castle.
What is it?
It's a (red) starfish.
What is it?
It's (a bottle of) sunscreen.
What is it?
It's a (gray and white) seagull.