Book excerpt: Use the included pen to do these wipe-clean counting activities again and again! 1...2...3! Let’s start counting with the fun wipe-clean number activities in Let's Learn: Count with Me. This book includes a wipe-clean marker and an array of activities—from counting cars to tracing numbers—that help children develop first counting and number skills. After completing the activities, children can erase the marker and do the activities over and over again.