system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does time "fix" electronics?

Similar things have happened in the past but a week ago my son dropped a stuffed bunny he has that sings, claps its hands and waggles its ears when you press on its foot.  He dropped it on the floor hard and instead of working it would just slightly vibrate until you flipped a hard off on switch.  Tried resetting it a few times and it was still broken.  This morning, a week later my son turned it on and it functioned fine again.

It seems like sometimes, just giving it time will solve problems such as this, curious as to what could be a reason for that.
gpt
Electronics are made possible by metal connections that allow electricity to flow through them. Over time or through repeated use, these metal connections can be corroded and/or lose contact. Normally this ends making the electronics unusable.

However, with random luck, these contacts can reconnect due to some force knocking them back together or through temperature changes stretching or shrinking the components. This is why back in the days, you can sometimes "fix" electronics by bashing them a few times. However, nowadays, the circuits in advanced electronics like smart phones are small enough that this doesn't help. Nevertheless, more simple electronics like the stuffed bunny can sometimes reactivate this way. 

A similar thing happens with batteries. You may notice that removing and placing the same dead batteries in a device makes it power on even when previously it was dead. A small amount of corrosion forms between the contact of the battery and the electronics which will stop a bit of the energy. When you remove and place the battery back in, you may end up making a fresh contact, allowing the energy to flow again (though for a limited amount of time).