ワオっちおかいものレジスター is an educational app developed by WAO CORPORATION. It is designed for children aged 2 to 4 years old and aims to make pretend play like "shopping" or "playing store" more fun and engaging. The app allows children to use their iPhone's camera to scan barcodes on everyday items and hear the price read aloud. The app automatically calculates the total amount as items are scanned, just like a real cash register. Children can also choose from a variety of register designs and create their own price tags with barcodes. Additionally, there is a printable money sheet available for even more interactive play. Overall, ワオっちおかいものレジスター provides a creative and educational experience for young children to learn about money and role-play in a virtual store environment.