Advice for something to get my toddler (four-year old boy) for first camping trip

I'm a fairly experienced camper and backpacker, but my four-year-old hasn't had the chance to enjoy the wonders of camping yet! But that is all about to change as he and I are heading out this weekend for his first camping trip.

It's going to be a simple affair, just an overnighter not too far from home. We already have all the basic necessities like food, clothing, and shelter, but I'm hoping to head to the local outdoor shop and get him something before we head out that will make the occasion more special.

So, any of you with young ones find something that your little one absolutely loves that is both exciting and practical, but doesn't break the bank? Or any trail snacks that were extra special? Any and all advice appreciated!