need a safety dining utensil for dogs. i can t believe it but there wasn t a fork out there for dogs. reporter: what parent doesn t need a plastic hippopotamus to store your kids teeth. as the teeth fall out, simply glue them into place. reporter: what hypochondriac doesn t need a portable, sealable, germ-resistant face mask that can also withstand pepper spray? inventions so creative, even thomas edison would give a fist bump, or, if he s not around, you could get one from the plastic hand this guy invented. you the man! reporter: these are just some of the 4,000-plus entries in walmart s get on the shelf campaign. they asked everyday at-home tinkerers to post videos of their best inventions. hi. this is richard. my name is larry herring. this is sam. reporter: you see everything from shorts made of towels to tools to avoid the agony of cleaning up after your dog. and position it under your dog s tushy. reporter: it s honest, american ingenuity at its best.