Pass out tambourines. Explore tapping, hitting, tapping on head, knees, elbows, shoulder, etc, then sing through tapping in different ways.
When we count 16th notes, there are four in a beat. We say 1 e and a to count them.
1 e and a 2 e and a tapping on my tambourine
1 e and a 2 e and a that’s how I count sixteenth notes