Piggy Penny can help you teach your young kids about money. At its base it is a money manager that allows kids to save up digital pennies in order to buy things they want. It's made mainly for younger children not older than 6 or 7.
As their parents you control the addition of any new money either by editing their balances directly or by applying periodic allowance amounts.
You are also in charge of deciding what things you kids can save for by creating money categories, i.e., a toy fund or a bike fund.
Your kids can then move their money around between their individual funds and can spend from any of them too.
This is a fully local application for now which means it's stored locally on an iPad or iPhone. In its next version it will be possible to use it across devices.