My Birthday Box has a bunch of fun instruments in it for the birthday kids to play while we sing them a birthday song.
I decorated a shoe box (the hinge type that stays connected on one side) like a birthday present. Then I filled it with instruments I've collected from various places including toy stores, dollar stores and music stores. The prices range from $1-$6.
The kids love to play the instruments and when we have a bunch of birthdays we have a 'Birthday Band!'