Super easy for a Friday. Ollie (3) worked on counting forward and counting backward. Counting backward is just as important as forward but so easily can be forgotten about. Ollie used beads to represent the numbers but any small manipulatives would work. Another idea would be to start counting at 3-13 and back from 13-3 so kids learn to start counting and subtracting from other numbers besides 1 and 10 🙂
