to spring up like mushrooms in a sentence

1. Memorials began to spring up like mushrooms : more than 25 free-standing statues of the late prince were built, in cities across the country.
2. Despite age restrictions on the women's tour and the need for a power game on the men's tour, tennis prodigies continue to spring up like mushrooms, many of them traveling to the United States with eager parents who still believe that the sport can deliver their children to the pot of gold at the end of a global rainbow.
3. It's difficult to find to spring up like mushrooms in a sentence.