Card-based problem set to cultivate thinking skills for 3-4 year olds. - Product Name: Wisdom Cards 3-4 years old - Size: 147 x 100mm - Contents: Cards to develop 11 thinking skills - Target Age: 3-4 years old - Format: Card-based problem set Price: 1400 yen Thank you for viewing. This item is new and unused. I purchased it but did not use it, so I am selling it.