The Sims Bustin' Out Tips

Make money and improve skills
To earn a little bit of extra cash, buy a gnome workbench. Get your Sim to make gnomes. This will improve your mechanical skill level, and you can sell the gnomes you make. The higher your skills, the more expensive the gnomes become, and once the level reaches 10, the gnomes will sell for $100 each.

You can also do this with the artists block and improve creativeness at the same time, but you have to keep buying new blocks for each sculpture, so work on your creative with an easel first. Once the skill level reaches 10, the blocks (which cost $300) will sell for $500.