The Play Smart series of English-language workbooks for young children is a long-selling series, especially in North America. 30 titles have been published as of April 2023, with a total circulation of more than one million copies. The books feature a variety of activities such as writing, cutting, pasting and painting, as well as lots of fun stickers. Gakken's unique care and attention to detail has been highly praised by parents as well as educational experts, including a Gold Award from The Mom's Choice Awards® in the US. In addition to North America, the product is also available in ASEAN countries.