The general idea here is a set of toy tools that make the user think they can fix anything that's broken (the definition of what "broken" means depends on what the user would normally perceive as in need of fixing) but doesn't give them any actual knowledge of how to fix it. Since it's a toy it's marketed towards kids and since kids generally don't actually know how to fix things, they'll mess up the fix, which creates a feedback loop. So for example a kid with a toy pipe wrench would see a leaky faucet, think "I can fix it!", then five minutes later he realizes he's just punched a hole in the sink, think "I can fix it!", and cut to an hour later and the whole house is flooded. In order to compensate for the fact that kids aren't weak enough to do any real damage, the tools would probably have to have the additional property that they're way more effective than they should be. I'm thinking of ending it with an actual horror gut-punch where a kid sees his brother bleeding from some minor scrape, picks up the hacksaw, and says "I can fix it!"; cut to later and the brother has been dead for hours and the kid is still frantically trying to "fix" him. The tools don't override your consciousness or your conscience, they play on the fact that most kids naturally (a) want to help out and (b) want to cover up if they make a mistake. On the same note if the kid is mean or lazy and doesn't want to help out they'll still be convinced they can fix all the broken things they see but won't actually bother doing it.
I posted this in the chat before posting it here and people seemed to be generally interested, although they pointed out there's a similar object in the anomalous item log:
Item Description: An upright piano. If a human touched any of the piano keys, the human became irresistibly compelled to play the piano and sing popular Broadway show tunes, for a period of three hours or until the player was incapacitated. It is to be noted that the item did not provide musical talent, knowledge of tunes, knowledge of lyrics, or the ability to sing on-key.
I think that my idea has enough merit to stand on its own but if there's some way it could be made more distinct I'd love to hear it, or if it seems like too close of a match and I need to majorly rethink it.
I'm also worried that the ending twist is too obvious of a conclusion - people in chat jumped to it right away, even before I said it.
Any and all feedback is welcome!