Unfortunately, as an AI language model, I do not have access to the internet and can't verify information on specific locations or events. However, I can provide a general summary of what you may expect from a playground in Indiana.

Playgrounds in Indiana are popular destinations for families, especially during the warmer months. Camp Allen Playground is likely no exception, offering a space for children to play, exercise, and interact with others. Depending on the location, visitors may find features such as swings, slides, climbing structures, and playhouses.

In addition to the playground itself, visitors may also enjoy nearby amenities, such as picnic areas, hiking trails, and sports fields. Depending on the park's location, visitors may also have access to scenic views, wildlife, and other points of interest.

As for the best time to visit, it will depend on the location and activities available. In general, summer tends to be the most popular time for outdoor activities, but visitors should be aware of weather conditions and plan accordingly.

Overall, visiting a playground in Indiana can be a fun and affordable way to spend time with family and friends. Whether for a quick playdate or a full day of adventure, there are plenty of options to explore.