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“A father's child. A mother's child. no one's son. Who am I?”
― M. Prefontaine, Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love

“B, C, D, E, G, P What is the next letter in the sequence?”
― Puzzleland, 30 Interactive Brainteasers to Warm up your Brain

“A father is sent to jail and the mother will have to sell her hotel. But their 16 year old daughter is laughing and looks happy and excited. If they all love each other more than anything in the world, and no one has a mental disorder, how can you explain the girl’s attitude?”
― Puzzleland, 30 Interactive Brainteasers to Warm up your Brain

“Two convicts are locked in a cell. There is an unbarred window high up in the cell. No matter if they stand on the bed or one on top of the other, they can’t reach the window to escape. They then decide to tunnel out. However, they give up with the tunneling because it will take too long. Finally, one of the convicts figures out how to escape from the cell. What is his plan?”
― M. Prefontaine, Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love