An Irish harp (or Clarsach if you're feeling Gaelic!) is distinguished by its triangular frame. Originally it was strung with brass wire, but modern versions generally use strings.
If you're not too particular about the shape, you can make your own harp and experiment with a little science in the process!
Here's what you need:
s (you know the little darlings are just itching to flick them at someone!). Stretch the rubber bands across the open shoe box. Space them so they aren't touching.
Now strum or pluck the bands. Compare pitches of different rubber bands. Try pushing your finger on the end of a band to stretch it tighter. Then pluck the rubber band with your other hand. Listen for how the sound changes.
Musical instruments, such as a harp, make sounds when the strings vibrate the air. Sound waves travel through the air like ripples across a pond. High sounds make waves that are close together. Low sounds make waves that are further apart.
If rubber band harps strike a chord (pluck a chord?) with you, there are lots of different versions. You can use a speaker and go hi-tech.
Your finished shoebox harp may not sound authentic, but with some help from kinderart.com, it can look more like the real deal.