An idea is only worth something if (1) you can protect it and (2) you can exploit it. If you are looking for a laugh, check out the totallyabsurd.com website. There are plenty of ideas that are being legally protected, although the feasibility of being able to exploit these ideas remains to be seen….
A Cry-no-more strap on pacifier:
A head-napkin (to help hunters remain camouflaged)":
Insect balls (to keep the insects away while you are outside):