Fr Z has a post with photos from a reader of how her son aged 9 has set up his Playmobil figures for the Liturgy. (See: Play Mass)
Although 90% of the liturgies that he attends are celebrated versus populum, he set up the altar ad orientem, and the tabernacle in the centre. Clearly he needs to go to a modern liturgy course, fast, before things get worse and he starts adding a deacon and subdeacon :-)
Father also has this amusing video of a Bishop who confused the microphone and the aspergillum.