Sit in a circle. A beat is tapped out by everyone with the rhythm Knees, Clap, LeftClick, RightClick i.e. 1,2,3,4. On each set of clicks the next person has to say the next part of the words. The parts are below (the rhythm is written above to explain when the parts are said): Knees,Clap,Click-click ....................One frog, Knees,Clap,Click-click ....................two eyes, Knees,Clap,Click-click ...................four legs, Knees,Clap,Click-click ...................in a puddle, Knees,Clap,Click-click ...................ker-plunk. Once all that is done the next person says "Two frogs" and the game continues, except now the numbers of eyes, legs and ker-plunks have to double, i.e. Two frogs, Four eyes, Eight legs, In a puddle, Ker-plunk, Ker-plunk. Next it becomes trebled: 3 frogs, six eyes, 12 legs, in a puddle, ker-plunk, ker-plunk, ker-plunk. And so on. (e.g. 6 Frogs, 12 Eyes, 24 Legs, in a puddle, Ker-plunk, Ker-plunk, Ker-plunk, Ker-plunk, Ker-plunk, Ker-plunk). If someone hesitates or makes a mistake, everyone sings the mistake song which goes "der der der, der der der, der der der der der der WOO!" in time with the rhythm, and then the next person starts again from "One frog". The idea is to see how many frogs the group can get to.