Jesus told us that He is coming soon over 2000 years ago, so very often when we hear that we just smile and say,"Yes, He is," and move on with our everyday lives because we have really no idea how soon that "soon" really is.
The Bible teaches us that God is outside of space and time, so for Him 2000 years is a mere moment in eternity, but perhaps God is trying to catch our attention by speaking to little children because now, it is sooner than ever before on our time scale?
The Lord always reveals Himself to those of pure heart and you cannot find a purer heart than that of a little child. I just talked to our nephew and his wife who are missionaries and have two young sons. They told me how just recently their 2 year old woke up from a nap during a car ride very excited saying: "Mommy! Daddy! I had a dream from God. Jesus is coming soon!"
They said that their hair stood on their bodies, because even though they are Christian missionaries and their children hear about Jesus often, they never really talked to their son about Jesus' return to earth or the end times, thinking it is beyond the scope of understanding for such young child.
If you put into Google or You Tube search words such as : "Children have dreams and visions of heaven" you will get as many as 23, 100, 000 results! All filled with stories of children of various ages and backgrounds telling about Jesus' return, of heaven, sometimes even hell, and of the end time events that they could not have known about in the natural, but that confirm the biblical end time narrative.
I encourage you to try it yourself and read/ hear some of those stories, it is very fascinating to see so many common themes that show up in them. God is for sure doing everything He can to get our attention, and those are only the ones who are being reported and uploaded onto the Internet, so in reality the numbers are even higher.