MakingFriends Printable Morse Code for Junior Detective Girl Scout Badge Key shows how to express numbers and letters in long and short sound signals - meets one of the requirements for Junior Detective Badge.
Place Value Cups. Use the cups to understand place value practice counting forward and backward learn the names of large numbers decompose numbers to expanded form. I would either label the cups 'ones' 'tens' etc. or add a comma cup or decimal point cup