This is the first story idea, using the time-period that the phrase 'Children should be seen and not heard' is often connected with, Victorians, as well as interpreting 'In the Laboratory' as in an alchemists Laboratory.
Alchemist sat in the basement working with potions.
Noises of two children above keep distracting him and cause him to spill a chemical and ruin his work.
Frustrated, comes up with an idea to quieten the children by making a new potion that will turn them to stone.
Creates new potion.
Goes upstairs and gives the children the disguised potion.
Alchemist carries on his work happily in the basement now the two children are silent.
'In the Laboratory' & 'Children should be seen and not heard' Influence Map
Initial ideas for the direction to take the phrases in is for a Victorian time period due to the phrase 'Children should be seen and not heard' been commonly associated with it. Following the idea of this time period, interpreting 'In the Laboratory' as more of an alchemist working in the basement rather than a modern day laboratory.