The Educational Insights See and Stamp Jumbo Lowercase Stamps are clear plastic stamps that allow children to see where they are placing them. They can be used for a variety of different purposes. They can help children learn their letters numbers words sentences and math equations. Measuring 1 square they are easy for little hands to hold. The included handy plastic storage case makes them simple to organize and clean after a long day of playing. They are designed for pre-kindergarten children. This plastic alphabet letters kit can be used at home at school or even in daycare settings. They can make learning fun with their bright colors and easy usability. The lowercase letter stamps have a durable construction. Each one has a square shape with the letter printed boldly on it for easy viewing.