The Beano Book / Annual has had many great covers over the decades but this remains a favourite of mine. I know some of you like it too so I thought I'd show it here today. The Beano Book 1967. An excellent illustration by David Sutherland of General Jumbo and all the Beano characters as his radio-controlled model army.
If that wasn't fascinating enough for a 7 year old (as I was then), it also touches on the infinity effect by showing characters emerging from that very book, and that cover has a similar army emerging from a book... and presumably on into infinity. Quite a mind-blowing concept for a kid to take on board, and I was captivated by it back on Christmas Day 1966 when I had this book.
And I still think it's a great image to this day. Click on it to see it in more detail.