I just finished making some very easy sweets.
Basically you take a can of condensed, sweetened milk and pour it into a pan, turn the heat up to medium/high and stir it until your arms falls off. eventually it'll thicken and brown a little. Remember at this stage it's at very high temperature and can burn you BADLY cos it sticks too. Also it'll get a lot thicker when it cools so unless you're trying to make a glass shard, take it off the heat while it's still quite soft but one lump. cut it into strips with a buttered knife and when it's cool enough to handle, tear off lumps and make them into balls. Let them cool and give them to your friends before u die of sugar rush.
You can also make a toffee sauce by boiling the UNOPENED cans. I am not joking. You take a can, DONT open it, cover it with plenty of water and boil for 1 to 3 hours depending how thick and toffee-ey you want it. two important points: 1) dont open the cans till they're completely cool unless you want hot toffee sauce in your face 2) DONT let the water boil dry or the cans WILL explode. My wife found this one out the hard way. fortunately she wasnt in the room at the time.