このケキはとてもかわいだ!
そのケーキはとてもかわいいだ!
I think this is a better form for your sentence.
この = This
その = That*1
ケーキ = This is the proper form for cake
かわいい = This has another い
*1
Sono-hon (that book)
Ano-hon (that book)
Well the difference is :
"Sono-hon misete kudasai" means
"Show me the book you're reading/you have with you/you've just mentioned;"
"Ano-hon misete kudasai" means
"Show me the book over there." or
"Show me the book you mentioned the other day."
I hope this helps you in your lessons Pfil.