Money Pieces helps students visualize and understand its values and relationships. There are two versions of coins and bills in the app. The currency pieces mimick the appearance and size of U.S. coins and the dollar bill.
Check out their great tutorials (https://bit.ly/3uyacG2).
web link (https://bit.ly/3gtgGxt), iOS app (https://apple.co/3uBxXNh), or for Google Chrome (https://bit.ly/3GAbbI6).