We visited Colombia in a group of 4 kids and 4 adults and had a memorable trip and a great experience. It’s a place that is still almost untouched by American tourists. People were friendly, and the food was great. I recommend interior cities much more than that coast. The Caribbean coast I found to be not so clean, and people were way more ready to rip off tourists. Cartagena is something to see though if you have a couple of days.
Here are a few guides to start with for family travel to Colombia. I’ll update with some of our favorite places as I get a chance, or feel free to leave a comment so I can respond.
Travel to Colombia with children from See Colombia