Five Below, a chain of discount stores focused on young shoppers, plans to double its number of locations in Philly to 120 and triple its number of storefronts nationwide to 3,500 by 2030 as part of its quest to reach $5.6 billion in sales by 2025. The chain known for its wide variety of cheap toys, candy and other items that cost less than $5 opened its first store in Wayne, Delaware County, in 2002.