Ciara,
do you have enough computers for the children, or would you be setting this up as a station that the children can visit? The nice thing about stellarium app is that you don’t need the internet to use it, so you can install it on a device and freely let the children use it.
We had a set of 10 laptops at BCO that we used to use with Stellarium – so I have seen a lot of children get quite lost in the sky and in time. This is when you need to know the short cut of ‘Press number 8 to return to now.’