Digital Sandbox KC is welcoming three new companies and a new funding partner: Overland Park. The proof-of-concept program already supports entrepreneurs in Kansas City, Independence, Olathe and St. Joseph. Its new partnership with Overland Park will give entrepreneurs in that city access to the program, which helps early-stage entrepreneurs further their idea through funding and resources such as market validation, prototyping and beta-testing support. The goal is to help them take their product...