Starting off with a few of my faves for keeping my tongue supple ;)

The sixth sick sheikh's sixth sheep's sick

I'm sailing down the river on a rough cut punt not a punt cut rough but a rough cut punt

Which witch wished which wicked wish?

(the last is better for lip-pucker practice :) )

|Ken Dodds dead dogs dads dogs dead :o

Sea shells sea shells on the seashore, I'm sure that the shells are sea shells I'm sure. :D

Red leather, yellow leather, red leather, yellow leather, red leather, yellow leather...............