Donald, a minor, makes a contract with Albert, an adult, to buy a motorcycle. One week later, Donald has his eighteenth birthday and shortly thereafter tells Albert he will pick up the motorcycle next week.

Donald has expressly ratified the contract.

The contract must be renegotiated, because Donald was a minor when it was made.

Donald can change his mind and avoid the contract, because it was made when he was a minor.

The contract is void ab initio, because Donald was a minor at the time it was made.