When I was fairly young, my sister and I were playing a game with a friend. We were pretending to be spies or something of the sort and were coming up with some pretty ingenious ways to eradicate evil-doers. One of these methods involved us skidding around the drive as we pretended to dice up the bad guys with our imaginary "roller blades" after incapacitating them.
As a six year old who only ever used traditional skates, I never questioned the logic behind why we all thought the wheels on roller "blades" were actual "blades", thus capable of being used in a lethal manner.
A childhood belief about toys

others believed things like this
- When we were younger my sister and I used to think that our shoulder blades were really sprouting wings.— Raven
- I used to think that the shoulder blades were actually "back breasts".— Kdees
- i used to belive that if you smashed your hand in a roller your bones would be fine but your arm would be flat— rap masta cheseepuff
- My sister thought (not more than one year ago, she is now 14) that John Doe was an actual person.— Brother to Natascha
- I thought that smoking pot involved an actual pot from the kitchen.— Aeris
- My little sister's imaginary friend was Kit the talking car from that show Knight Rider.Anon