The best alternatives to Ootsuk are Curiosity, Kosmos School, and Cubspot. If these 3 options don't work for you, we've listed a few more alternatives below.
Kosmos is a project-based K-12 school that exists only in virtual reality offering classes (called Projects) where kids collaboratively complete objectives by learning and applying hard skills like math and physics, but also soft skills like critical thinking, creativity and collaboration.
From award-winning creators! Otsimo | Speech Therapy SLP is proud to be the only Speech Therapy app that uses voice and speech recognition technology and machine learning; it understands exactly what you are trying to say!