Dum-Dum-Da-Da
(source: "Campfire Activities", Girl Guides of Canada, 1993.)

Dum-dum-da-da
Da-dum-dum-da-da
Da-dum-dum-dum-de-dum-da
Da-dum-dum-dum
Dum-dum-da-da
Da-dum-dum-da-da
Da-dum-dum-dum-de-dum-dum
Woah woah woah

Actions:

1st time through: drum hands on thighs

2nd time: two slaps on your thighs, two slaps on your right-hand neighbour's thigs, two slaps on your own thighs, two slaps on your left-hand neighbour's thighs, repeat

3rd time: two slaps on your thighs, cross your arms to do two slaps on each of your neighbours' closest thighs, uncross to do two slaps on your thighs, spread your arms to do two slaps on each of your neighbours' closest thighs, repeat

Thanks to Heidi for this extra set of actions:

Right hand to nose, left hand to right ear (simultaneously tap twice)
Clap Clap
Left Hand to nose, right hand to left ear
Clap Clap
RH to N, LH to RE
Clap Clap
Cross hands to tap shoulders, Hands Tap Lap, Clap, Snap
RH to N, LH to RE 
Clap Clap
LH to N, RH to LE
Clap Clap
Repeat last four lines until the end of the song

Repeat the song a number of times, getting faster