The "bank" functionality is achieved by leaving a narrow slit between the final interlocking folds where coins can be inserted. 2. Cardstock "Piggy Bank" House
For a step-by-step visual on folding a glue-free version, watch this guide:
This design is ideal for beginners and uses folding techniques to create a secure compartment for coins or small notes.
Fold the paper into a basic box shape with a reinforced lid.