ABCMouse is an early-learning staple here in our house. All three of my daughters have spent countless hours roaming around the site (and app), completing their journeys and of course, purchasing their virtual classroom pets with achievement tickets!
ABCMouse's main focus is to help children build a strong foundation for academic success. Their curriculum is fun, engaging, and undoubtably holds the attention of my early learners better than Mr. Potato Head!
The program itself focuses on early learning kiddos (ages 3-4), pre-k, kindergarten, and even early elementary school programs, through their Adventure Academy (for ages 8-13).
ABCMouse isn't free, unfortunately, BUT it's well worth the expense.
ProTIP: A quick google search of the service, alongside the word "coupon" can generally get you a discount upon registering.