Row, Row, Row Your Boat

Row, row, row your boat
Gently down the stream.
Merrily, merrily, merrily, merrily,
Life is but a dream.

More Versions:
Row row row your boat
gently down the stream
if you see a crocodile
don't forget to scream! (scream)

Rock, rock, rock your boat
Gently to and fro.
Look out, give a shout!
Into the water you go! (pretend to make a big splash)

Row, row, row your boat
Gently down the shore
But if you see a lion
Don't forget to roar! (roar)

Row, row, row your boat
Gently down the lake
But if you see a little snake
Don't forget to shake! (shake body)

Ocean Version: Sing first verse as usual then add:
Waves are coming! (spoken)
Rock, rock, rock your boat…
Other motions could be: Twist your boat, wiggle, bounce, tickle, tip …
Row,  row, row your boat
Gently in the sea.
Along came a (marine animal - ie shark, fish, octopus...),
To ride along with me

A snowy version:
Row, row, row your sled gently through the snow
Faster, faster, faster, faster down the hill we go!

Using Different Adverbs: 
Row, row, row your boat... (match the way you sing the song to the adverb you use!)
Quickly down the stream 
Slowly down the stream
Quietly down the stream
Loudly down the stream

Other Ideas:
Rock, rock, rock your boat....
Sail, sail, sail your boat....
Ride, ride, ride your bike, gently up the hill, merrily, merrily, merrily, merrily, we won't take a spill - whoops!
Flap, flap, flap your wings, flap them up so high, merrily, merrily, merrily, merrily, fly them to the sky - wheee!