“Pick up the supplies for his science project,” she said after thinking.

“The school list is on the fridge.

I can send it to you.”

I bought the poster board, tape, safe scissors, markers, and small plastic containers the next morning.

I checked the list twice and brought the receipt in case she wanted to split the cost.

She shook her head and told me to keep it.

Then she handed me Mason’s rough sketch.

He had drawn a bridge strong enough to carry a rocket.