My son was six when we started playing D&D. Digging my AD&D rule books out for the first time in 25 years, I quickly realized what an overly complex, disorganized, and over-explained mess they were. So I went back for B/X books and we played with that for a year. Until I discovered this excellent "retro-clone" / rewrite, which expands on the two slim original books just the right amount - reorganizing, refreshing, and extending the game without changing the tone. In the past year I've used Labyrinth Lord as the foundation for some house-rules and more substantial edits (e.g. imported concepts from Dungeon World) and 20+ year old ideas that I've always wanted to have in place. Labyrinth Lord's simplicity allows this.
[5 of 5 Stars!]