Many people will say that the word Transubstantiation is just too difficult for children to understand or even pronounce. And so they often don’t mention or discuss it at all.
It is interesting that children of all ages have never had any trouble saying the word Supercalifragilisticexpialidocious from the movie Mary Poppins.
The word tran·sub·stan·ti·a·tion has 6 syllables.
Where as su·per·cal·i·frag·i·lis·tic·ex·pi·al·i·do·cious has 14!
Supercalifragilisticexpialidocious defined means – adjective (used as a nonsense word by children to express approval or to represent the longest word in English.) via Dictionary.com
Which really means nothing.
Transubstantiation defined means –
1. the changing of one substance into another.
2. Theology. the changing of the elements of the bread and wine, when they are consecrated in the Eucharist, into the body and blood of Christ (a doctrine of the Roman Catholic Church). Dictionary.com
Which means everything.
Please watch watch this fantastic 1:18 second video from RealcatholicTV.com with your children to help them understand that this is what going to Mass is really all about.