Ask students who else might like to eat their crops and what might harm them.
Introduce the idea that we can protect our crops. Show photos of different protective structures.
Decide on which structure the group is going to make.
Plastic bottles, plant pots or plastic balls
Fine netting or fleece
Pegs and string
Twiggy or willow sticks
Bamboo canes at least as tall as the crop will grow or blue alkathene pipe