Ask children if they would like to write down things that are scaring them now.
Also, make and obtain a worry monster. Some sort of soft toy with a large mouth. Each night they can place or talk their worries to this, and the monster eats them up, so that by morning,those worries are all consumed.
Do not assume that because children are not talking about their fears, that they do not have them , in fact any bottling up of these is far more concerning.
As far as education, do practical maths - how much wallpaper will this wall need, how much curtain material for that window, helping to weigh out food for recipes, etc. etc.