I just completed the street food tour with Ducky (from Australia) and our driver Smiley a few moments ago. I could not wait to write a review here since it was one of the highlights of my trip to this region. Ducky is a terrific guide and host giving you a true inside view of the culture of Cambodia. I would recommend this trip to anyone of any age!
After picking me up at my hotel on a tuk tuk driven by the great Smiley, we started the tour atop one of the tallest buildings in the city for a breathtaking view of Phnom Penh and a nice drink. Then we ventured to an incredible night market filled with fruits, produce, fish, meat, etc. where we sampled various fruits like snake fruit, longon, tamarind, etc. then some tastey freshly prepared local desserts that were amazing. From there we ventured to another market for the best pork ribs you'll ever eat then you could sample (and I suggest you do) a variety of crickets, water beetles, etc. which were all yummy. I was surprised and glad I tried them. We continued on to another couple places with the last spot being a local BBQ restaurant where we had delicious frog, prawns, chicken curry, squid, and a few other surprises along with endless drinks of your choice. You can try anything you like without any pressure. Some ate everything (like me), while others were selective........
Really, a delightful experience and I'd highly suggest that you do this to see the city, experience a bit of local culture and indulge in wonderful food.