Yes, modern opera balls still exist in many cities around the world. These events are often glamorous affairs that bring together opera lovers, philanthropists, and high society for an evening of music, dancing, and fundraising for opera companies. While the tradition of opera balls may have evolved over time, they continue to be a popular and prestigious event in the cultural calendar of many cities. **

Fat balls for birds are typically durable for several weeks, depending on the weather conditions and bird activity in the area. In colder temperatures, fat balls may last longer as they solidify and are consumed at a slower rate. However, during warmer weather or in areas with high bird populations, fat balls may be consumed more quickly and last for a shorter period of time. It is recommended to regularly check and replace fat balls to ensure they are fresh and safe for the birds. **

There are many different types of bowling balls available, each with its own unique characteristics. Some popular options include plastic balls, urethane balls, and reactive resin balls. The best bowling ball for you will depend on your skill level, playing style, and lane conditions. It's important to do some research and possibly try out a few different options to find the one that works best for you. **

Trampoline games with balls include activities like trampoline dodgeball, where players try to hit each other with balls while bouncing on the trampoline. Other games with balls on a trampoline can include basketball, where players try to shoot hoops while jumping. Trampoline games without balls can include activities like trampoline tag, where players try to tag each other while bouncing, or trampoline races, where participants compete to see who can bounce across the trampoline the fastest. **

Transparent balls are spherical objects made of a clear material, such as glass or plastic, that allows light to pass through them. These balls are see-through, which means you can see objects or images on the other side of the ball. Transparent balls are often used in various applications, such as decorative ornaments, scientific experiments, or as part of children's toys. **

Yes, moss balls, also known as Marimo balls, are able to float in water. Their buoyancy allows them to move around the water's surface, making them a unique and interesting addition to aquariums or decorative water features. Moss balls are able to float due to their round shape and the air trapped inside them, which helps them stay afloat. **

Smoke balls are legal in many places, but there may be restrictions on their use in certain areas. In general, smoke balls are considered novelty items and are often used for entertainment or special effects in events such as concerts, parties, or sports games. However, it's important to check local laws and regulations before using smoke balls to ensure compliance with any restrictions on their use. **

Yes, it is possible to push balls. When you push a ball, you apply force to it in the direction you want it to move. The ball will then roll or slide in response to the force you applied. The ability to push a ball depends on factors such as the size and weight of the ball, as well as the amount of force applied. **