Learn measurement & estimation 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 WiFi 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. Osmo games bring a child's creative imagination to life with hand held pieces. Approved by parents and teachers worldwide, used in over 40,000 classrooms.Osmo is part of the BYJU's learning products family along with Epic and Tynker. BYJU's helps over 100 Million children in 40+ countries learn smarter, better and more efficiently with the help of fun interactive learning games.