Problem: Continue the following story.

The wall was built of brick or wood to build the foundation. The
Here's how I want to continue it: wood was more flimsy and unstable.

Problem: Continue the following story.

The chair was a stronger piece of furniture than the table because the
Here's how I want to continue it: table was made out of weaker wood.

Problem: Continue the following story.

The sled worked better in the snow than the toboggan, because the
Here's how I want to continue it:
toboggan had a sticky bottom.