At a time like this 
At a time like this 
At a time like this
Oh I need someone to help me

Actions: After each "At a time like this" you do the action
twice, & after the last 
line, you only do it once. First time through you clap twice:

At a time like this (clap clap)
At a time like this (clap clap)
At a time like this (clap clap)
Oh I need someone to help me (clap)

Then you add the next action: oogah oogah (spoken while holding
your fists clenched at elbow level, pulling back horizontally on the "oo" part):

At a time like this (clap clap, oogah oogah)
At a time like this (clap clap, oogah oogah)
At a time like this (clap clap, oogah oogah)
Oh I need someone to help me (clap, oogah)

More actions:

Third verse: tap tap (spoken while clapping your own hands in
"gimme five!" 
fashion eg: one on top of the other, then the other on top)
Fourth verse: nannu nannu (what Mork from Ork used to say on
Mork & Mindy) 
spoken while putting your arms out either side Egyptian
style (walk like an Egyptian)
Fifth verse: ping ping (spoken while patting your head with 1
hand)
Sixth verse: whoosh whoosh (spoken while flipping your hand back
& forth over your head)
Seventh verse: Whoa (pause) whoa (pause) (spoken while twirling
an imaginery lasso over your head)

The last action is "TA DA!" with arms outstretched. By then you
should be singing:

At a time like this (clap clap, oogah oogah, tap tap, nannu
nannu, ping ping, whoosh whoosh, whoa whoa, TA DA!)
At a time like this (clap clap, oogah oogah, tap tap, nannu
nannu, ping ping, whoosh whoosh, whoa whoa, TA DA!)
At a time like this (clap clap, oogah oogah, tap tap, nannu
nannu, ping ping, whoosh whoosh, whoa whoa, TA DA!)
Oh I need someone to help me (clap, oogah, tap, nannu, ping,
whoosh, whoa, TA DA!)