Dog
Dog, cat
Dog, cat, mouse
Froggie!
Itsy bitsy, teeny weeny little bitty froggie
Jump, jump, jump, little froggie
Spiders and flies are scrum-deli-icious
Ribbit, Ribbit, Ribbit, Ribbit, Ribbit, Ribbit, Ribbit
Croak

Actions:
Set up a clap/lap-slapping rhythm, and repeat each line after the leader.
On the first run-through, do it slowly;
with each repetition go faster, until the audience tires