Use turns as a natural ending
Three clues, one drawing or a single story round is easier to stop than an open-ended project. Explain the transition before starting when you need to leave or serve a meal. Extend only if the real schedule allows.
Before starting, check the materials and adult-help notes in the guide. Begin with a small version and keep a familiar alternative available. If the idea does not fit the day, simplify the task or choose a different pace; a longer list is not always the answer.
A useful next step
Choose one guide above and save two ideas you can actually use. The free starter pack gives you a paper backup for moments when you would rather stop searching and begin.