I love these plastic ladybugs that I found several years ago from Oriental Trading! Unfortunately, they don't sell them anymore, but you could use ladybug erasers, foam shapes, beads, etc.
This is a simple addition activity that my kindergarten students loved. Just spin, count out your ladybugs onto the leaves, then say and/or write an addition problem.
I recently pulled this out for Mr. Two (who is three) and modified the activity. I spun one spinner and Mr. Two the other. We counted our ladybugs onto our leaves, then pointed to the group that had more (or less).