While Donald Trump has renewed his attacks on anti-racism protests, the demonstrations have continued. One of the striking things about the Black Lives Matter marchers is how overwhelmingly young they are. And in some cases, very young indeed.   Children have joined in after watching protests on TV and online and they have conversations with each other about what they experience when it comes to race.  So we spoke to some children in Washington DC to find out their views on the protests, policing and whether we may see lasting change any time soon.