Bubbles

It's not easy:

• you can't blow too hard
• you can't blow too soft
• you are not supposed to spill your cup empty during the process
• you have to blow your breath into the handle holes
• you cannot hold the handle against your lips if you don't want a gross soap taste in your mouth
• you cannot hold the handle too far away from your mouth

Most of the attempts fail completely but it's really fun when you manage to produce some bubbles