My son went missing in a forest at about that age, it was a national trust place and there was a picnic clearing, with woven wooden play teepees, we sat down, I got out the picnic stuff and he went to play in a teepee, I didn't know and couldn't see that there was an opening at the back of the teepee, I thought he was inside it playing, I called him to come out for the food and nothing, called again, got up to go and get him and looked inside and he was not there, he had gone through the hole in the back. I alerted everyone, ran around the forest behind shouting and shouting, it was the scariest 30 minutes of my life. I kept calling in the forest as I went deepr and eventually hear him call back and I was able to tell him to sit still and keep keep shouting, not to move any further and keep making noise so I could locate him. Thankfully I found him and he was safe and well, but what really shook me was how far he had gone and the direction he had gone in in such a short space of time. if he hadn't been able to hear me, and hadn't been able to answer back and follow my instruction to stay put, then this would have been a very different outcome. The forest was so huge and it was already 4pm. I checked the map of the area where this little boy has gone missing and it is surrounded by fields, woodland and very close to the estuary, I really do hope he is hiding somewhere close but just thinking about how far my child went in 30 minutes, they have a lot of ground to cover in the search and I think he could have gone quite far by now.