Since all the locations are within Bellflower, walking or biking would be perfect modes of transportation. Travel cost would vary depending on the mode of transportation used.
If you have more time, you can add a visit to the Earl Burns Miller Japanese Garden or the Historical Society and Museum. If you have less time, you can remove any of the locations that aren't of particular interest.
The nearest airport to Bellflower, California is the Long Beach Airport (LGB), which is approximately 11 miles away from the city center.