It start to have coinbank and a printed peso bill and circles shape indicate how many bills u need to finish it ..it attach outside of the coinbank.if you have extra money to save example 3 pcs of 100 bills.put it in coinbank and shades of 3 circle because 3 pcs..and so on until u finish the entire challenge and you will save 53,750 pesos..i make my own customize coinbank made from 4" pvc pipe because it is durable.i sold out also 30pcs of this coinbank to help also others to share and challenge them.