5-8 years.

"Official Nintendo licensed product"--Back cover.

"Nintendo and Super Mario fans ages 5-8 will love to meet Mario, Luigi, and all their friends and foes in this Step 3 Step into Reading level reader. Featuring over 30 stickers! Step 3 readers feature engaging characters in easy-to-follow plots about popular topics. For children who are ready to read on their own. Mario first appeared in 1981 with the arcade classic Donkey KongTM, and has since gone on to star in many adventures, allowing him to evolve into the beloved icon he is today. He is a video game sensation, appearing across all genres--from action-platformers to sports, kart racing and beyond."--