Watch Fun Size (2012) HD Full Movie Free on SolarMovie. Watch Fun Size (2012) online free. Wren's Halloween plans go awry when she's made to babysit her brother, who disappears into a sea of ...Wren's Halloween plans go awry when she's made to babysit her brother, who disappears into a sea of trick-or-treaters. With her best friend and two nerds at her side, she needs to find her brother before her mom finds out he's missing.