Making homemade instruments can be a little lackluster to say the least. They frequently only play one note and children loose interest very quickly. We made these xylophones out of inexpensive tubing that can easily be purchased from Home Depot and a cheap wrench set which you can find from Walmart, Target or the Dollar Store. We slit the tube down the middle and secured the wrenches with yarn. The pitch can be altered by how tight you secure the string. We found the looser the string the better the sound.
A video of our xylophone in action