How do you raise your bond in tamagotchi v5.5?

You can raise your bond in Tamagotchi V5 by responding to them when they want to play music or other activites. When a question mark or a music symbol appears you want to go to the bottom left button, press A (first button) and choose an activity for them to do. This also should have been in the instructions that came with your tamagotchi. Tamagotchi on!