Goku did it, and look how buff he is now!
I searched around for ages looking for an instructable on wrist and/or ankle training weighs, which I could wear during my everyday activities, and put some exercise into my otherwise fairly lazy life.
All the articles I came across, however, produced big chunky weights full of sand, or wheat, which could only really be used during actual training, without looking silly.
So I sought to make a pair of wrist weights which I could wear all the time, and look cool. Maybe even pick up (ok wishful thinking).
Sand and wheat are great, accessible, easy to work with materials, but at 1.6 and 0.6 grams per cubic centimetre respectively, I needed something more dense.
Lead (atomic number 82, chemical symbol Pb) is very heavy - about 11 grams per cubic centimetre, extremely soft and malleable, and has a melting temperature of only 327 degrees celsius. These characteristics all combine to form the perfect material for my purposes. My only other choice would have been Uranium, but that's a bit harder to obtain. And it causes cell mutation/super powers.
Lead is a heavy metal. It is poisonous if ingested or inhaled, causing nerve damage, blood and brain disorders. Make sure you wash your hands thoroughly after handling, and use proper ventilation during the melting process. Also wipe down the food preparation surfaces near the stove afterwards. If you have children, you may want to wash your clothes after working with lead, to avoid exposing them to any lead particulate on your clothes.