Students love “I Spy” activities! This Earth Day I Spy hidden numbers to twenty activity is an engaging, fun way for students to practice number recognition. Choose between low prep centers activities or the NO PREP worksheet. For a fun twist use with a magnifying glass and watch as your students become number seeking detectives.An excellent math activity for preschool, pre-k, kindergarten, and daycare programs.This resource includes:Full color and outlined learning mat options.Full color and ou