I'm afraid to count but here goes:

the real instruments:
2 Guitars (Alvarez starter, Martin 000-15s)
3 Appalacian dulcimers (no-name, McSpadden, Folkroots baritone)
2 Mandolins (bowl-back, 1919 Gibson A)
3 Flutes (Gemeindhart student, Tipple PVC, Sweetheart rosewood)
6 Recorders (Sopranino, 2 Sopranos, 3 Altos - one nice, nice Tenor)
6 Whistles (4 irish type, one bamboo and 1 slide - that should go in the silly category))
1 Yamaha Digital Piano
1 Clavichord (built by my husband's dad nearly 40 yrs ago)
25 Harmonicas (including a chromatic set of Golden Melodies)

and the silly stuff:

3 Ocarinas
4 Jew's Harps
1 Bodhran
1 Washboard w. thimbles
1 Tambourine
1 Hammered dulcimer, hand made w. no bass strings
1 Bugle (one is enough!)
3 Kazoos
3 Shakey eggs (they seem to multiply)
1 pr Wooden Catspaw spoons
1 deer claw rattle

and the comment about too many books also holds true -- except that we do have a large bookcase in the kitchen, for cookbooks of course.