
Originally Posted by
M-bot
It looks to me like that pin behind the wheel might be a "one way" type, so it goes in without being able to slip out easily. If you absolutely must remove it, get a soldering iron (cheap is fine) and when it's hot, put the tip on the flat part of the pin (on the other side from the wheel). Be super careful to not allow the hot iron near the surrounding plastic as it will mark it, if not melt it a bit, even at the slightest touch.
The idea is that the iron heats the pin, which softens the plastic around it, enough to remove the pin/wheel. It shouldn't take more than a 30-60 seconds of contact. You don't want it to sit on there too long, because the hole around the pin could become too loose to sustain the pin and wheel when you reassemble (which can still happen no matter how careful you are - it's definitely a risk you will have to take if you want it out).
I suggest while you're holding the iron to the pin, you gently pull at the wheel until it starts to give. You will more than likely have to remove the wheel first and then push the pin out from the wheel side.
It is not an easy job. Frustrating for a newly opened toy.