I used to teach preschool. So anything a four year old would love, I love. And this, I love. Go for a walk with your students or kids, talk about all the shapes you see, noises you hear, and things your feel. Gather rocks while you go. When you get back, paint the rocks for a little activity, maybe eat a snack outside by a pond, read a story, who knows. THEN teach and sing the 5 little ducks song! Finger plays are such a great way to learn and this would be such a fun activity! I can't wait for Boston to grow up! Actually, I can because he's such a stinkin' cute baby. But it'll be fun when we can really start playing!