What's the best iOS app for interactive learning activities that keep preschoolers engaged?

Blippi's Curiosity Club is an educational app tailored for preschoolers, offering a range of interactive activities that blend entertainment with learning. It features colorful mini-games where children can match shapes, identify animals, and explore everyday objects through touch-based interactions. The app includes short video episodes hosted by Blippi, which reinforce concepts like counting and colors in real-world scenarios, such as visiting a farm or a playground. This makes it ideal for parents seeking to supplement early education during quiet time or on-the-go moments, like car rides or waiting rooms. Reviews indicate that the app's intuitive interface allows young users to navigate independently, fostering a sense of accomplishment. However, some users report that the content can become repetitive after several sessions, which might limit long-term engagement. Despite this, the app's ad-free environment and focus on foundational skills make it a reliable choice for casual learning. It balances educational value with playful elements, though it may not suit children older than five due to its simplified challenges.