Try a sample from my larger unit (link below)!
Use "The Day I Swapped My Dad for Two Goldfish" by Neil Gaiman, and these 2 free activities to explore BARTER & other fundamentals of economics. Suitable/scalable for ~4th grade and up.
Read the story together, discuss key concepts, and assign the creative writing for center, flipped, or seat work.
Concepts included here: value, opportunity cost, double coincidence of wants
Skills included here: creative writing (newspaper elements); concept application, critical thinking
Want more? Here is the complete Economics & Picture Books BARTER teaching set
Teach it as a full unit or explore concepts over time via the 7 picture books and 50+ pages of activities and organizers.