nature display boxes

At our local library yesterday, I was delighted to see a child’s nature collection on display.  And it got me thinking — what kind of boxes could I use to display our daughters’ finds?  Those shadow-type boxes seem expensive.  And yet, if my girls were to put their finds (feathers, teeth, bones, etc.) in a box, with a label, I’d be much less likely to throw the nature finds away.  And we could remember what each thing is and where we found it.

So.  Can you help me? I need ideas for how we can collect nature finds and display them without breaking the bank and without too much clutter.  Links for picture-ideas and stores would be helpful.

Thanks!