The musical instruments in the box included a Recycled Box Ocean Drum [you can find the blog post about that lesson plan here], A Q-Tip® Rattle, an Everything but the Kitchen Sink Rattle and a Milk Jug Sticker Shakere. These too are a hit.
Jannique immediately started shaking each of the instruments (sometimes two at a time) to see what sorts of sounds they made. Such fun!
The Milk Jug Shakere was of particular interest - I think because it was the only instrument where she was not able to immediately see what was inside. (So, of course we did some investigating).
Meanwhile, Daria was kind enough to send us a lesson plan - telling us exactly how to make our own Milk Jug Sticker Shakere. The materials are easy to find and the instrument is easy to make. She also provided us with some information on traditional shakeres. You can find all the details on our website at: http://kinderart.com/across/stickershakere.shtml