Gift box with self-inflating balloon

A device comprising:

• a housing comprising a lid;
• a balloon located within a compartment of the housing such that the balloon is obscured from a user's view when the lid of the housing is in an open position, the balloon including an opening;
• an inflation device, within the housing, in fluid communication with the opening of the balloon, wherein the inflation device is an electric air pump;
• and
• a controller, within the housing, coupled to the inflation device, wherein the controller is configured to activate the inflation device;
• and
• a one-way valve configured to couple the inflation device and the opening of the balloon, the one-way valve comprising:
• a plunger that is configured to, in a sealed configuration, close the valve, and configured to, in an unsealed configuration, open the valve;
• and
• a spring that is configured to apply a first force to the plunger such that the plunger is in the sealed configuration, wherein airflow from an activated inflation device is configured to apply a second force that is greater than the first force to the plunger such that the plunger is in the unsealed configuration, thereby opening the valve and allowing airflow into the balloon.