This activity is interactive using Google Slides. Each slide has a set of different numbers from 1 to 20 and students need to figure out which number is missing by dragging the correct number onto the snowman. This activity allows children to identify numbers from 1 to 20 and problem solve by the correct order. *Make sure you "make a copy" first for yourself in Google Slides and also click on "make a copy for each student" when uploading it to your Google Classroom.