preposition
prepositional phrase
object of preposition
100
The chameleon climbs on the twig.
What is on?
100
The aye-aye pokes his bony finger inside the tree.
What is "inside the tree?"
100
The children like playing at the beach.
What is beach?
200
She walks across the bridge.
What is across?
200
The clothes are drying in the sun.
What is "in the sun?"
200
The tomato frog watches for an insect.
What is insect?
300
The ladies walk beside the water at the beach.
What are beside and at?
300
There is one boat beside the house and the other is near the water.
What are "beside the house" and "near the water?"
300
The man sits on the log above the creek.
What are log and creek?
400
During the morning, we took a boat ride down the river in Madagascar.
What are during, down, and in?
400
The number of prepositional phrases in the following sentence: In the evening, the lemurs run across the logs while playing with each other. 
What are three phrases?
400
During the afternoon, the lady walked on the bridge high above the ground.
What are afternoon, bridge, and ground?