Birdseed and sugar

I saw these cute little clusters of birdseed shaped like eggs with a string in them for hanging in a catalog. They were presented in a cute little egg carton and I thought, why pay $35 for this when I can MAKE them? Okay, so how do I get the birdseed to stick? I tried a simple syrup, it is still firming up in the fridge, but my hopes are not high. I originally thought suet, but thought it would be oily. Ditto with Peanut butter. Any ideas on how to get the small pellets to a)form a solid cluster b) be edible to birds c) hold a little twine and hang for a moment to be adored before being devoured by ravenous chickadees d) not cause me too much angst. Any and all suggestions are very welcome.