The design a little more complex then the outside of the bubble machine seems.
There is a open/close tube on top of Chase's hat that where you can insert the bubble solution. The solution follows the direction of the tube and goes into the megaphone. Inside of the megaphone there are mechanics that will turn the solution into bubbles and will come out the yellow megaphone.
In order to be able to be able to produce bubbles, you need to make sure that there are two AA battieries inserted on the back of the dog. There is a grey badge with a star on the front of the dog which serves as the button.
This button is a toggle switch with latching action. You press the button once to turn the bubble machine on and it will stay on until you press it again.
Inside of the toy there are three wires. One green and red wire is connected to the batteries and one blue wire is connected to the motor.