Idk where else to put this (this, isn't a "small" question because it's a long story).
So my parents left my younger brother (8 years old) with me for the day. He was mostly quiet and playing, with his toys but I knew, that he would want to play one of those dumb roll and move board games with me soon, as he often does. Now, I know there are better board games that I could introduce him to but I forgot them in my parents' house. And I tried to teach him chess earlier (I'm decent at it, 1700 Lichess) but he wasn't interested. So instead of wasting an hour playing a pure chance-based game with no strategy I decided, to do this.
It works like this: There is a spiral path, divided into "cells" with two spaces marked "start" and "end", player tokens, start at the start and then you roll a die to decide how much you move. There are also special cells but that's, not important to this story. Each player had his own die (important). Since the game (I don't think you all know it, it's, locally produced I think. But it's a generic roll and move) depends on dice... A thought, appeared in my head. I remembered watching a documentary about cheaters in gambling and how people use loaded dice to cheat. So I took the die I wanted him to use (just a d6, I had spares), covered it up with one of those plastic covers for microwaving food, just in case, and microwaved it for a while, the goal being, to make 6 come up more often so he wins easier and, faster. I decided to not "un-load" my own die (cook it so 1 comes up more often) because it wouldn't affect Bortei (said brother's name) chances of winning as much, because, he is likely to win anyways.
Then as I predicted he asked to play the game. I made sure to look enthusiastic and, quietly sweared at myself, for forgetting the actually good and interesting games. I noticed that, the die looked a bit weird (slightly flatter), meaning I overcooked it. Thankfully he didn't notice. And of course, most of the time, he rolled 6s and won easily while I was barely halfway, across the board. He was happy, about winning.
I'm currently calling my parents, if it's OK if I play computer games with him instead.
Was what I did right? Cheating to lose, to make my young brother feel better and not play something that is boring for me for a long time?
EDIT: Clarified some things and fixed a few typos.