Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.
How does the time of dawn and dusk vary? What about the Moon, how does that change from night to night? Is the Sun always the same? Gather data to help you explore these questions.
Do you know which birds are regular visitors where you live?
If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?
Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?
If Tom wants to learn to cook his favourite supper, he needs to make a schedule so that everything is ready at the same time.
Creating a schedule to cook a meal consisting of two different recipes, plus rice.