Also: Cool treehouses; a printer made out of Legos.
Rich Pedroncelli / The Associated PressA car drives past a plastic bag lying on a on-ramp to Highway 70 Wednesday near Olivehurs, Calif. The California Assembly on Wednesday passed legislation that would prohibit grocery stores, pharmacies, liquor stores and convenience stores from giving out free plastic and paper bags. If signed into law, California would be the first state to impose such a ban.