I have always wanted to see what danger may be lurking inside them, but was too embarrassed to buy one. I will buy one today. I can always say to the cashier, "Oh, it's not for me, I just want to choke my grandson."
(Oh, oh, I see a ban coming for wishing death. Sometimes the mods think they are MTF's Homeland Security.)
You could always say that your grandson is old enough not to choke with an egg. Like 20 years old or something. Or maybe grandsons choke with eggs by default? Just an idea