Space Cadet - A movie so incredibly rubbish that it should come with its own public apology before the final credits.
Its been years since I watched a more cringeworthy mess of poor/no acting, an utterly asinine plot (and I use both words very generously), and had literally not enjoyed any of the last 90 minutes of a movie this much.
Avoid, and especially if your kids actually do like Nasa, or have functional frontal lobes.