Practice and learn mental math addition & subtraction through hands-on play on a 1st & 2nd grade math adventure! Real-time targeted teaching tips & nudges let kids learn through experimentation and build confidence in a stress-free environment. Self-paced play means kids have time to master a concept before moving on to new material. (No Wi-Fi necessary for game play). An Osmo Base for iPad or Fire Tablet & an iPad or Fire Tablet are not included, both are required for game play. (No Wi-Fi necessary for game play). An Osmo Base for iPad or Fire Tablet & an iPad or Fire Tablet are not included, both are required for game play. By incorporating physical game pieces, Osmo ensures kids learn advanced addition, subtraction and early multiplication by doing. Loved by parents and teachers worldwide, used in over 31,000 classrooms.