
Junior Course · Ages 4+
Pip borrows three coins
- Say what a promise is
- Know that borrowed things are given back
- Know that a written promise is called a note
Contract Constellation lesson
A promissory note is a written promise to repay money. Discover its parts — principal, interest, maturity and signature — at three age levels.
Junior 4+Explorer 8+Advanced 13+15 minutes

A promissory note explained for kids starts with a simple idea everyone understands: a promise. In this lesson, Professor Ledger shows how a written promise to repay money works. First, younger explorers hear a story about borrowing coins. Then, older explorers examine principal, interest, maturity and what happens when a promise is broken.
A promissory note is a document in which one person, the borrower, promises in writing to pay money to another person or company, the lender. It usually lists the amount borrowed, the interest rate, the due date and how payments are made. Finally, the borrower signs it.

Promissory notes sit behind student loans, car loans and home loans. Because they are so common, understanding them helps young people make careful choices later. In addition, this lesson clears up a common mix-up: on a home loan, the note is the promise to repay, while the mortgage or deed of trust secures it.
After this lesson, continue to Mortgage vs. Deed of Trust on Property Planet. This lesson is educational and is not legal advice.
Start with the level that matches your learner, then try the next level up when they are ready. For example, a family can read the Junior story together, while an older sibling works through the Advanced version. Because every level covers the same topic, this promissory note explained for kids lesson works well for mixed-age groups, homeschool co-ops and classrooms. Finally, the quiz shows what stuck, and the summary makes a quick review the next day.
Lessons are taken inside the Wealthonauts courses, where your child’s progress and quiz scores are tracked. Pick the course for your child’s age.

Junior Course · Ages 4+

Explorer Course · Ages 8+

Advanced Course · Ages 13+
This lesson is awaiting expert editorial review.
Wealthonauts lessons explain how financial systems work. They are educational, not financial or legal advice. Laws differ between states and countries.