List of ideas

• Someone trying to drink out a bottle but people keep blowing over the top of the bottleneck and it whistles.
• Instruments whistle
• Woopie-cushion underwater?
• Reeds whistling in the wind - bulrushes but looking like train whistles?
• Bathtub full of water - mother and baby rubber ducks, and they're all whistling but mother is bottom up, trying to whistle underwater but can't.
• Bird looking down from branch at a fish?4
• Bird singing in a bubble
• Bird trying to sing but waterfall coming out of or into its beak.
• Someone stood upside down? Friend giving him a drink while he's trying to whistle.
• Desert walk? Trying to whistle with a dry mouth