Problem Solvers is a free, play-based early math curriculum for children aged 2 ½ to 4 years old. It includes 22 early math activities, 22 specially-composed songs to support each activity, and 22 read-aloud suggestions that embed early math learning into literacy experiences. Each unit also includes a parent resource (English/Spanish) suggesting at-home math play ideas. Free download at www.zerotothree.org/problemsolvers