Math picture books are great during math lessons. On day two you could read How Much is a Million? Then continue the discussion of how numbers and math are all around us.

Here is a list of math picture books. I am sure you library has many of them.

http://childrenspicturebooks.info/ar...s_for_math.htm
After the read aloud you could send them back to their seat to draw a collage diagram of all the things they would buy if they had a million dollars. Ask them to label each item. Then share. This would make a great get to know you activity and get them excited about math.