Practice sorting coins as you talk about the Prodigal Son and the fortune he spent!
Cupcake liners (or small bowls)
Work with your kid to sort coins by type into cupcake liners.
Talk about things you can use money to buy.
Review the story of the Prodigal Son remembering that he spent his money foolishly, but his father still loved him. Jesus told this story to teach us that God loves us no matter what.