A zither dither

Hi there,
Here is Bernie.
Bernie head is spinnin awound cos he was twyin to sort out a dither for litta Heidi.
Heidi found Gwand-ma's 'puter when Gwand-ma was talkin to Katy on the telephone.
She wanted to Google sissors but she got it all mixed up and found out about zithers.
Bernie find a picture of a zither and put it on his blog for peoples to see. A zither be a instwument wif stwings wot people can poke and it make music.
Poor litta Heidi. When Bernie find her she cwyin.
Bernie say "Wot is you cwyin for Heidi?"
She say "I want to find a thithors and and I got a thither."
Bernie look at the scween. He say "Is this a zither?" and she say "Yeth but I want a tithors and I do not know what ith the differenthe"
"Oh" say Bernie "Well don't get in a dither. This is a zither and this isn't a zither"
"Well I wanted to thee thome thithors" say litta Heidi.
Bernie vewy quickly type sissors and then she can see some sissors.
She lucky she got a Unca Bernie to help her.
Love fwom Bernie.