what motivates children - praise, or reward, for example, soon its mothers day and they know there mum will be really pleased with them if they make an especially good card, so they spend a long time making it as good as they can. and they like to know that they can get really good at something ie the strongest at arm wreastles or the fastest at running so they like to be told they are good at stuff.
tell them they have to gocart with a cup of water on there head. it doesnt matter if it falls of and they get wet because its raining. then they all race around, and the person with the most water left in there cup gets a prize. make it into a game because they forget its raining.
cant help with the angry thing i dont get angry either..